Four-year-old daryl describes himself in the following ways: "i’m a really fast runner. my hair is brown and i like to eat junk food." daryl’s beliefs about himself are known as his:
a. self-esteem.
b. self-concept.
c. self-actualization.
d. self-confidence.

Self-concept

Explanation:

Self-concept is a general term that is used by a person for self. It is about how someone thinks about himself, perceives himself, judges himself. The self-concept is about a person's attributes about a self who he is and what he thinks about himself. The self-concept is a term that is very important in both the context of social and psychological.  

Thus here in the above statement, Four-year-old Daryl tells about herself. As she told that she is a fast runner and her hair is brown and would like to eat junk food.