After Mr. Walters' neighbor helped him paint his house, Mr. Walters felt obligated to offer to help the neighbor remodel his kitchen. Mr. Walters' sense of obligation most likely resulted from the

Mr. Walters' sense of obligation most likely resulted from the reciprocity norm.

Explanation:

The norm of reciprocity consists of the action that motivates one person or thing to reciprocate with another, giving and receiving with limits, for example when one person helps another, then they will receive the same from them as compensation or gratitude. The norm of reciprocity is one of the most important on which the functioning of human groups is based. This principle is applied in multiple interactions and influences, for example, social influencing processes related to marketing, helpful behavior or interpersonal attraction.