Final answer:
A behavioral psychologist would most likely make a statement regarding the study of how behavior changes in response to environmental influences, aligning with the goals of behavioral psychology, which studies how behavior is shaped by the external environment.
Step-by-step explanation:
The student's goal to learn how behavior changes in response to environmental influences would most likely be articulated by a behavioral psychologist. This field of psychology is actively concerned with understanding the relationship between behavior and the external environment, including how behavior can be modified or shaped through various forms of conditioning and reinforcement.
Evolutionary psychology focuses on the ultimate biological causes of behavior, often considering the adaptive significance of behaviors over the course of human evolution. Meanwhile, epigenetics is the study of how genes and their expression are influenced by environmental factors, without changing the underlying DNA sequence. Lastly, a researcher interested in factors that influence job suitability is likely to be a personality psychologist, and someone examining cellular changes in the hippocampus and their relation to memory is likely engaged in behavioral neuroscience.