Answer: Plants or the sun
Explanation:
The sun gives energy to the plants which get the most but since the sun isnt an organism I would say plants.
They survived by moving to new areas.
Your answer is (B.)
Fossils in newer layers if rock are generally estimated to be younger than fossils found in the deeper layers because it is closest to the surface. The soil and earth didn't have enough time to "bury" the remains of the dead animal ( Bury is used for a simpler term) underground. The farther down a fossil is the more likely it is older unless the animal tends to burrow. Seeing as the question is probably talking of older animals that is unlikely for an animal to burrow that far. So your answer is B.
In our community the ecosystem provides fresh drinking water via pipes called citywater or ground water. It should be protected well, because it is our cities only source of clean water, ''purified''.
