FOMENT :

Extirpate
Provoke
Isolation
Abrasion

The correct answer is B.

To foment is to stir up or encourage feelings of anger, excitement, or violence. It can also mean to promote or encourage the development of something.

Extirpate means to destroy completely, especially by uprooting or killing.

Isolation means the state of being alone or apart from others.

Abrasion is the act of rubbing or scraping something against a rough surface, causing damage or wear.

In the context of the question, the correct answer is B because fomenting something means to encourage or promote it, which is the opposite of extirpating it, which means to destroy it completely. The other options are not relevant to the question.