Which adaptation do organisms need to live in an estuary?

!if we removed the wolf, snake, and hawk from this food web, what best explains the impact it would have? a) the number of producers would increase. b)the number of decomposers would increase. c)the number of primary consumers would increase. d)the numbers of primary consumers would decrease.

What is the most appropriate method of gaining weight (muscle mass)

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?