Discarded plastic, rubber, glass, and styrofoam are examples of wastes.

c. He is going through the process of exploring his identity that many adolescents experience.

Explanation:

According to Erick Erickson's fifth stage of psychosocial development (identity vs role confusion) which is occurs during adolescent, During this stage, adolescents search for a sense of self and personal identity, through an intense exploration of personal values, beliefs, and goals. This stage is characterized by identity confusion or role as the child tries out many things, trying to decide where he or she belongs. At this stage, the child learns the role he or she will occupy in adulthood.

Rik is likely in the stage of psychosocial development and he is trying out what interests him.