Final answer:
A developmental psychologist specializes in studying changes such as self-esteem through puberty and adolescence, which falls under the study of psychosocial development within developmental psychology. Hence, option (b) is correct.
Step-by-step explanation:
Changes in self-esteem through puberty and adolescence would most likely be studied by a developmental psychologist. Developmental psychology focuses on the scientific study of human growth and development across the lifespan, including physical, cognitive, and psychosocial development. Concerns with self-esteem, identity, and social relationships during puberty and adolescence fall within the realm of psychosocial changes that developmental psychologists aim to understand and explore.
For instance, a developmental psychologist would study how adolescents develop a stronger sense of personal identity, their system of moral and ethical values, and how they perceive and manage their self-esteem. As adolescents experience significant physical, cognitive, and social changes, developmental psychologists analyze the impact of these changes on the individual’s sense of self and social interactions, including those with peers and family members.