NEET BIOLOGY

Detailed explanation-1: -Adulthood is commonly thought of as beginning at age 20 or 21 years. Middle age, commencing at about 40 years, is followed by old age at about 60 years. A brief treatment of development during adulthood follows. For full treatment, see human development and human behaviour.

Detailed explanation-2: -Adolescence (generally defined as puberty through age 18) Young adulthood (generally defined as 18 to 22 or 18 to 25) Later adulthood (generally defined as mid-20s and older)

Detailed explanation-3: -By 20 years old, a young person is usually considered an adult: their body size is fully grown, they can vote, get married, and many have already entered the workplace. But the evidence suggests that, by many important measures, adolescence continues until around the age of 24 to 25.

Detailed explanation-4: -In the United States, a child becomes an adult legally when they turn 18 years old.

Detailed explanation-5: -Adulthood is divided into three stages: (1) early, (2) middle, and (3) late adulthood. Early adulthood starts at age 18 or 21 and continues until the mid-30s. During middle adulthood, people start to show signs of aging. Late adulthood is when most people retire from work and reflect on their life.