It is theorized that age-related cognitive decline occurs in middle adulthood because of structural changes that the areas of the brain that develop last are the ones that begin to decline first, namely areas located within the frontal and parietal lobes.
An adult, in contrast to a "minor," is a person who has reached the age of majority and is therefore considered independent, self-reliant, and responsible.
Early in adulthood, a person becomes physically mature (28 years old). Adults reach their peak strength, height, and weight at this point. As an adult nears the end of this life stage, endurance and strength slowly begin to decline.
Sudden loss of childhood comfort and support, often struggling to transition to full independence. Gone was the sphere of structural and emotional support that life in her family home provided, replaced by the lonely and unknown world of the outside world.
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