The theory of states that organisms that are better suited for their environment will survive and reproduce, while those that are poorly suited for their environment will die off. a.) evolution by natural selection b.) genetic mutation c.) survivalism d.) behavioral genetics

A) evolution of natural selection

a.) evolution by natural selection.

Explanation:

According to the theory of natural selection, organisms which are better suited for their surrounding environment have higher chances to survive and reproduce as compare to organisms which are poorly suited for their surrounding environment.

Darwin gave theory of natural selection and stated that all living organisms show variations, which are essential for evolution of a new species. Hence, it is known as theory of evolution by natural selection.