Final answer:
The two general kinds of changes that occur between infancy and adulthood are physical growth and development, such as an increase in size and weight, and cognitive and psychosocial development, like forming attachments and emotional regulation. Adolescence involves additional physical, mental, and social changes. Adulthood includes changes like physical and cognitive declines, mitigated by an active lifestyle.
Step-by-step explanation:
There are primarily two general kinds of changes that occur between infancy and adulthood. The first kind is physical growth and development, such as an infant's rapid increase in size and weight. For example, newborn infants weigh about 7.5 pounds on average, and in the first year of life, they experience significant growth. The second kind is cognitive and psychosocial development, including the maturation of cognitive abilities and emotional regulation. An example of this is the development of attachment in infancy which is vital for healthy social and emotional development.
During adolescence, individuals go through mental, emotional, and social changes in addition to the physical changes of puberty. This stage includes further maturation of the brain, forming a stronger sense of personal identity, and transformation in relationships. In adulthood, individuals experience changes across early, middle, and later stages, including but not limited to physical decline in middle age, though cognitive decline typically begins later. Engaging in activities that keep the body and mind active can help maintain good health in these stages.