Read the passage: A cave system is actually not one single cave but a series of connected caves. The Mammoth Cave in Kentucky is the longest cave system in the world. The system is remarkably stable because it is made of limestone that is covered by a layer of sandstone. There are more than 405 miles of passageways that weave through the massive cave system. Every year, new caves and connections are discovered.

Several North American tribes have been known to settle in the cave system throughout history. Scientists have been researching the people that had once called the cave system home. The remains found in the cave had been protected from the elements, which makes them great specimens for studying. They are so well preserved that scientists can easily study the people's dietary habits. This research has found that the people living in the cave were once hunter-gatherers, and then they transitioned to a community with domestic plants and agriculture. That means they learned how to grow their own food instead of having to hunt for it.

Researching in this type of environment is tricky business. Moving an artifact even a little can diminish its research value. That is why explorers are trained to not disturb artifacts they find. They learn how to collect and study the items they find without spoiling them. It is because of this sensitivity that the cave system is protected and is now a national park.

What evidence does the author use to support the idea that the cave system is stable?

It is made of limestone that is covered by a layer of sandstone.

A cave system is not one single cave but a series of connected caves.

Every year, new caves and additional connections are discovered.

There are more than 405 miles of passageways within the cave.

When reading a poem closely to interpret its meaning and nuances, what can give you clues about the theme of the poem? athe rhyme schemebthe stanza structurecthe title of the poemd.the name of the poet

21) this excerpt involves david, who travels with an inventor named perry. they test their experimental invention, a vehicle that burrows into the earth's crust. which statement best reflects the human experience that is represented in this excerpt? a) humans are not always reliable guides. b) humans desire wealth and a life of ease. c) humans are drawn to explore and experiment. d) humans attempt to conquer and control nature. 22) which statement best reflects the human experience that is represented in this excerpt? a) humans desire to control nature. b) humans are frightened by nature. c) humans are fascinated by nature. d) humans cannot understand nature. 23) 8 “what do you mean perry? ” i cried. “do you think that we are dead, and this is heaven? ” suppose the author changed section eight as listed below. 8 “perry, i have to object! ” i cried. “you don't think that we are dead, and this is heaven, do you? ” which correctly identifies the author's meaning for the word object? consider the effect of the stressed or unstressed syllable in the word object. a) you would stress the second syllable because the word is a noun and means a goal or purpose. b) you would stress the second syllable because the word is a verb and means to express or feel disapproval. c) you would stress the first and second syllable because the word is a verb and means to modify an adjective. d) you would stress the first syllable because the word is a noun and means a thing that has a finite, physical form. 24) 2 together we stepped out to stand in silent contemplation of a landscape at once weird and beautiful. before us a low and level shore stretched down to a silent sea. as far as the eye could reach the surface of the water was dotted with countless tiny isles—some of towering, barren, granitic rock—others resplendent in gorgeous trappings of tropical vegetation, myriad starred with the magnificent splendor of vivid blooms. 3 behind us rose a dark and forbidding wood of giant arborescent ferns intermingled with the commoner types of a primeval tropical forest. huge creepers depended in great loops from tree to tree, dense under-brush overgrew a tangled mass of fallen trunks and branches. upon the outer verge we could see the same splendid coloring of countless blossoms that glorified the islands, but within the dense shadows all seemed dark and gloomy as the grave. which most completely analyzes this excerpt for a comment about life? a) beauty is kind and inviting. b) nature is evil and forbidding. c) there is no risk in following beauty. d) what appears beautiful can also be deadly.

What task did the surveyors do? a. they studied the landscape to determine the most direct route for building a road. b. they designed treadmills that lifted blocks of stone to where they were needed. c. they dug trenches and filled them with sand, concrete, and large blocks to form a road.