An experience, circumstance, or condition that affects a person is called a stressor senescence weathering selective optimization with compensation

The correct answer is "a stressor".

A stressor can affect a person in different ways. It can also be considered to be different factors. A stressor may cause positive and negative effects towards the subject itself. A stressor is commonly found in the workplace, in the school or in heavy tasks that are needed to be accomplished.

The correct answer is a