Deterioration of cognitive abilities among the elderly, to the point that social and occupational functions are impaired, is called

dementia

Explanation:

Dementia: The term "dementia" is distinguished as loss of memory, thinking and problem-solving capabilities, and language that is considered severe enough to interfere with an individual's day-to-day life. Alzheimer's is denoted as the most common reason behind dementia. In other words, dementia is a group of social symptoms and thinking that tends to interfere with an individual's daily functioning.

Symptoms: Forgetfulness, disorientation, irritability, loneliness, depression, etc.

Treatment: Therapies, and medication.

In the question above, the given statement represents "dementia".

d.

thist title points out that you are explaining the nature of the u.s. government. it is the most specific. a representative government consists of a government where decisions are taken according to a voting system. the most essential aspect of a representative government is found in the different structures where voting rights are granted to different groups of people. for example, voting for governor, mayor, president, local police chief etc.