Final answer:
A positive sense of self is crucial for children's emotional and social development, and its development spans from infancy through adolescence according to Erikson's psychosocial development theory.
Step-by-step explanation:
The role of sense of self as a factor in children's development is best described by the statement: Developing a positive sense of self contributes to healthy emotional and social development. This concept begins to form in infancy and evolves throughout childhood into adolescence, influencing confidence, independence, and willingness to engage in new experiences. Erikson's psychosocial development theory highlights the importance of the sense of self at various stages, from developing autonomy in toddlerhood to the search for identity during adolescence. A positive self-concept during these stages helps children and adolescents develop socially and emotionally, supporting their overall well-being and ability to contribute positively to society.