Psychologists study animals because

A) they want to understand how different species think and behave.
B) animal physiology is often simpler and easier to understand than human physiology.
C) it is more permissible to conduct certain types of research with animals than with humans.
D) of all of these reasons.

Animal Physiology

The study of the physical and chemical processes that occur within animals, affecting their functionality and behavior.

Different Species

Distinct groups of living organisms that have different sets of genetic traits and are typically unable to interbreed successfully with one another.

Human Physiology

The study of the functions and mechanisms in a human body that contribute to health and to disease processes.