Human development (biology)

Human development refers to how humans grow and change from the time they are born until they become adults. It can be broken down into four main stages: infancy, childhood, adolescence, and adulthood.

Infancy is the stage that includes babies from birth to two years old. During this time, babies learn how to crawl, walk, talk, and interact with the world around them. They also develop their senses, including sight, smell, touch, taste, and hearing.

Childhood is the period from ages 2 to 12. During this time, children continue to learn and grow physically and mentally. They acquire new social and educational skills, develop their personalities, and form relationships with other children and adults.

Adolescence is the stage from ages 12 to 18. This stage is marked by physical changes, including the onset of puberty, and the development of a stronger sense of independence and identity. Adolescents also begin to explore sexuality, moral and ethical values, and their place in the world.

Adulthood is the stage from age 18 onwards. During this time, individuals continue to learn and develop, though at a slower pace than in earlier stages of life. They acquire new skills, build long-term relationships, and continue to develop their personalities and talents.

Overall, human development is a complex process that involves both biological and environmental factors. It is influenced by a variety of factors, including genetics, nutrition, parenting, education, and social and cultural factors.