The Invaders by Mark Sanchez
During the early 1900s, two kinds of invasive organisms turned up in waterways in the United
States. One was the Asiatic clam, a fast-growing shellfish that crowds out other aquatic animals.
The other was milfoil, a fast-growing aquatic plant that overcomes and displaces native water
plants.
Wildlife officials are seeing once-smooth freshwater beaches littered with sharp, tiny shells. Though
Asiatic clams are rarely larger than 1.5 inches across, the sheer number of the shells is cause for
concern. The highest populations occur near power and wastewater plants. The clams cause problems
by biofouling, or clogging intake valves. Biofouling also occurs in irrigation canals and pipes and
drinking water facilities. Repairing damage caused by Asiatic clams is expensive. Experts estimate
that the price tag has reached one billion dollars per year in the United States.
(continued)
Explore how to answer this question: "How can I best summarize this bulletin?"
The author presents a central idea in each paragraph but does not state it directly. The important text
details support the central idea, so identifying them will help you determine the central idea. This in
turn will help you summarize the text.
Reread the bulletin. Underline the important details. Then fill in the missing information below.
Central idea of paragraph 2: Biofouling by Asiatic clams, one type of invasive species in U. S. waterways,
causes costly repairs to industrial and agricultural water facilities.
Important detail from the text:

the author is showing that it is the insatisfaction of basic needs that brings about the protests such as the strikes.if workers do not earn enough to buy food and feed their families and themselves in order to continue working, what is the use of working? besides, another message from the author is that of the owners of factories should be worried about ensuring their furure by having a second and third generation of workers in their industries.if they do not hear the workers demands, they will not have any more workers to make their pockets full.

the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."

the correct answer is b. in order to explain a point clearly in an essay, it is always better to include a clear example of your ideas. including an scenario in which a family is affected by consumerism will support your argument as well as supporting details, such as quotations from experts and statistics. option a could be correct, but statistics and quotations are supporting ideas rather than clear explanations. choices c and d are simply inadequate. they do not add information about the effects of consumerism, rather they are strategies for engaging the reader

vey information about pap? physical description beliefs actions interactions