What do mudstone and sedimentary rocks formed from the remains of once-living plants and animals have in common?

a. they are made up of the same kinds of minerals.

b. they are formed from layers of sediment.

c. they are formed when melted rock cools and hardens.

d. they are made up of the remains of plants and animals.

Why are fossils of organism's from the phanerozoic eon much more likely to be found than fossils of organisms from any other eon? a. more organisms present during the phanerozoic eon had soft body parts. b. organisms present during the phanerozoic eon were all microscopic. c. more organisms present during the phanerozoic eon had hard body parts. d. organisms present during the phanerozoic eon are the most ancient life forms.

Which factors add to the greenhouse effect and are caused by human activities?

Find the area of the shaded region.