Which of the following terms refers to the necessary stress that activates and motivates people to achieve goals and change their environments? a. distress.
b. cognitive dissonance
c. general adaptation syndrome.
d. eustress.
e. emotional dissonance

d. eustress

Explanation:

Eustress  can be seen or refers to the stress which can  be  beneficial to the person or individual involved, and this stress can either be  psychological or  physical such as exercising ,which is why EUSTRESS can tend to be a  positive response that a person or an individual has to a stressor and  can depend on one's current feelings of control, desirability as well as  timing of the stressor .

Therefore EUSTRESS help to  produces  positive feelings such as   excitement, fulfillment, satisfaction that activates and motivates people to achieve goals and change their environments.