Darwin's theory of argues that evolution favors those organisms that are best adapted to their environment.

Darwin's theory of natural selection argues that evolution favors those organisms that are best adapted to their environment. The law states that organisms with heritable traits better suited to the environment will survive while the inferior species will be eliminated.

i think the answer is gold im not entirely sure

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle