Question

This is the wants, needs, or beliefs that cause a character to act or react in a particular way?

Answer 1

Character.

Step-by-step explanation:

Wants, needs, or beliefs could be the definition of the character, which means the mental and moral qualities, personality, nature or disposition.

This could be confusing, because Character is a homograph word, is spelled the same, but has different meaning, like this case.

Answer 2

I think motivation, motive, incentive, drive and ambition all could work as an answer.