Psychologists study animals because

Explanation:

Psychology is the science that studies the mind. The aim of a psychologist is to understand the behavior and motivations of an animal including humans. There are various reasons why psychologists study animals they are:

An animal has the same basic drives that a human does but animal has different variables that controls their behavior in order to fulfill their drives.

An animal may have a shorter lifespan, different food habits, different sleep habits etc. How does the animal behave considering all these variables in mind is the function of the psychologist to figure out.

Understanding the mind of an animal helps us to know more about the animal. We may be use this information for our benefit like training a dog, horse etc.

With what we can learn from animals can also give us an insight into the minds of humans as well.

Also it is easier to control the variables in an experiment of an animal rather than a human and there are less ethical reasons to be considered.

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge