Final answer:
Disgust functions as a rejection of something unpleasant or offensive.
Step-by-step explanation:
The correct answer to the question is b. Disgust.
Disgust is an emotion characterized by a strong aversion towards something unpleasant or offensive. It serves as a protective mechanism by helping us avoid potential harmful substances or situations.
For example, if we encounter spoiled food, our sense of disgust helps us reject it and prevent us from consuming something that could potentially make us sick. Disgust also plays a role in social interactions, as we may feel disgusted towards harmful behaviors or individuals who violate moral standards.