The local fire department calls and asks you to donate $5 to the community firefighters' fund. Believing this is a reasonable request, you agree to donate. The following month someone from the department calls and praises your "humanitarian gesture," after which you are asked if you could donate a "small amount more." You agree to donate $10. The fire department may have used a persuasion strategy called the technique.

afoot-in-the-door

Explanation:

A foot in the door technique is a method of persuasion that is aimed to make another person agree to do a larger request by having them agree to a smaller request first.

After agree to a smaller request, most people tend to develop a positive emotions because we felt that we have helped another person (doing a good thing). When we are asked to do a bigger request, we  become more inclined to agree because we unconsciously wanted the positive feeling back,.

true

explanation:

agreeableness is a personality trait manifesting itself in individual behavioral characteristics that are perceived as kind, sympathetic, cooperative, warm, and considerate.