In the late devonian era, the seas began to recede and the land became more fertile. these environmental changes resulted in the emergence of land-dwelling vertebrates. some animals are better able to survive and reproduce under changing environmental conditions. this is an example of: a. evolutionb. mutationc. speciationd. natural selectione. adaptation

D. natural selection

Explanation:

Natural selection is an evolutionary process in which organisms that are better adapted to changes in the environment survive and contribute more to the subsequent generations in terms of reproduction.

The weak organisms gradually phase out of the population because they are weakly adapted to changes in the environment. Hence, they are not able to survive and or reproduce.

Hence, processes whereby some animals are better able to survive and reproduce under changing environmental conditions ahead of others are natural selection processes.