Answer:the decline of lichens is an important indicator of an imbalance in the ecosystem. this research can help system ecologists predict how pollution will affect the entire ecosystem
Explanation:
Out of the choices given, the mechanisms that drives evolution is natural selection. The correct answer is B, natural selection.
Gregor Mendel found out that treats depends on inherited factors. Also, he study science and math. He then study inheritance of treats and beginning to experiment. So, then he discover that traits depend on inherited factors while he experiment with peas. He had a garden to test with pea plants.
