As we age, we progress through different social roles that change and complicate our identities -- we become students, husband, wives, partners, workers and parents. social gerontologists refer to these changes as

Role transition.

Explanation:

As we grow older, we advance through various social positions that alter and hinder our identities — we become learners, husbands, wives, associates, employees, and parents. Social gerontologists name these alterations as role transition.

This method relates to the physical and psychological motion between roles in social system, including roll out from one ROLE and subsequent involvement in another.

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.