Explanation:

- Zeal: Refers to passionate enthusiasm or intense fervor towards a cause or activity.

- Option 1: Indifference: Means a lack of interest, enthusiasm, or concern. This is the opposite of zeal, as it denotes a complete absence of passion and engagement.

Correct Answer

- Option 2: Calmness: Relates to a state of peace and tranquility, not directly opposed to enthusiasm or passion.

- Option 3: Despair: Involves a loss of hope. While it is negative, it doesn't necessarily oppose enthusiasm directly.

- Option 4: Favorable: Implies approval or positivity. It's not an opposite to enthusiasm or passion.