An older person retires and begins experiencing health problems. consequently, the person loses contact with old friends and becomes unpleasant to be around. a behaviorist would explain the resulting depression in terms of: . learned .b. object relations loss. c. sociocultural changes. d. loss of positive social rewards.

d. loss of positive social rewards  

Explanation:

              Behavioral psychology or Behaviorism is the theory of learning that is based on this idea that all behaviors are obtained through conditioning. And conditioning occurs when an individual interact with the environment.

               When a person retires and starts to develop health problems, the person eventually loses contact with the society and starts to get depressed because he loses the positive social rewards.

              When one interacts with the society, it provides a sense of well being and self dignity that results in happiness and contend. The individual beliefs that he or she is being accepted by the society.

Thus when becomes unsocial, he enters into a state of depression.

Thus the answer is --

d. loss of positive social rewards

taking a bath requires the most water out of the given options because it takes a significant amount of water in order to fill a bathtub.