Describe an environmental factor that could influence natural selection and increase genetic
diversity.

Exposure to chemicals or radiation is an environmental factor that could

influence natural selection and increase genetic  diversity.

Explanation:

There are several factors that could easily influence natural selection and increase genetic  diversity. one such factor could be exposure to chemicals or radiation.

Radiations can alter the genetic code and disrupt the DNA decoupling and coupling process thereby producing altered gene. This altered gene when interact with native parent gene can give rise to mutated offspring. The presence of mutated/altered allele increases the genetic diversity.