Which of the following best defines psychosocial development?

Psychosocial development is best defined as the process of personality development through social interactions. This concept, largely associated with the work of Erik Erikson, emphasizes how social relationships and cultural contexts influence an individual's psychological growth across their lifespan. The development of personality is intricately linked to interactions with others, such as family, peers, and communities, leading to a deeper understanding of self and social identity.

The other options reflect different aspects of human growth and development but do not encompass the full scope of psychosocial development. Biological changes, cognitive skills, and physical growth are important factors in overall development, but they do not specifically address how social interactions shape personality and psychosocial well-being. In summary, option B captures the essence of psychosocial development by highlighting the interplay between personality and social relationships throughout life.