The motivation that causes people to work for their own enjoyment, not for the material rewards work may bring, is called

It's the intrinsic motivation

Explanation:

Motivation is the force that drives a person to move toward their goals. This sense of engagement may be related to career, health or personal life goals, and these can be triggered in a variety of ways. Intrinsic motivation depends exclusively on the individual and is directly linked to their feelings, tastes, priorities, desires and other stimuli related to internal issues. An individual can set some career goals and do everything possible to fulfill them.

what words? are you talking about to complet what sentence

answer; repetitive thoughts; ritualistic behaviors;