Apsychologist’s research focuses on how ecological changes affect a child’s growth. the psychologist’s focus fits best into the area of specialization known as psychology.

Developmental

Explanation:

Developmental psychology is known to be a branch of psychology in which research is been conducted on the growth and changes which occur in people as they age throughout their existence on earth. This type of research was primarily centered on children’s growth and it deals with the physical, social, intellectual, emotional and so on that take place in individual’s life throughout their life time. Thus, it studies how individuals adjust to different stages of life.

the answer your looking for is c. : )