Question

he talks about the cause with missionary zeal. source: washington times in this sentence, zeal means: a feeling of strong eagerness a feeling of intense unhappiness the feeling of despair in the face of obstacles fear resulting from the awareness of danger

Explanation:

The word "zeal" means great eagerness or enthusiasm. In the context of "missionary zeal", it implies a strong eagerness to promote a cause, similar to the eagerness of a missionary.

Answer:

a feeling of strong eagerness