Correct Answer: Openness

Solution : The correct choice is the third option.

Explanation:

The word reservation refers to the act of keeping something aside, often for a specific purpose or person. The most appropriate antonym in this context is openness , which implies the absence of restriction or limitation, making it the word with the opposite meaning.

The meanings of the other options are as follows:

• Catch means to capture after a pursuit.
• Conserve means to save or protect something.
• Doubt means a feeling of uncertainty.