Changes in behavior and cognitive processes over time are studied by
o historical psychologists
o evolutionary psychologists
o behavioral geneticists
o behavioral psychologists

Answer is evolutionary psychologists.

Explanation:

Human beings have the ability to continue to adapt to their changing environment, this is possible because of some traits possess by them.

Evolutionary psychology can be described as a branch or part of psychology that explained the ability of human being to be able to adapt to their changing environment because of their useful mental and psychological traits. Memory, reasoning and language are considered as examples of psychological traits.

The person that studied evolutionary psychology is referred to as an evolutionary psychologist. Charles Darwin was known to start the history of evolutionary psychology.