Professor shapiro is your life-span development instructor. one day in class, he discusses his belief that many older people withdraw from others because of their past stratification. he says that if they were to engage in activities with others, it would make life more gratifying and promote the positivity effect. professor shapiro is supporting theory.

Professor Shapiro is supporting the activity theory

Explanation:

The activity theory which is also referred to as the implicit theory of aging states that of elders continue to engage themselves in social groups and activities this will result into optimum level of ageing.

This theory suggest that elders being constantly engaged in social activities will improve their life and slow down the rate of ageing.

It suggests that there is a positive correlation between satisfaction about one's own life and being socially active.

answer; fair labor and standard act;

answer; ///biological psychologists;