Explanation:

- Derision refers to contemptuous ridicule or mockery. It's a negative expression towards something or someone.

- Option 1: Disintegration means the process of losing cohesion or strength. It's not related to feelings of mockery or praise.

- Option 2: Termination is the act of bringing something to an end. It's unrelated to either praise or ridicule.

- Option 3: Admiration involves feelings of respect and warm approval. It's the opposite of derision, which involves mockery or scorn.

- Correct Answer: Admiration

- Option 4: Estimation is an approximate calculation or judgment. While it can involve respect, it's not directly an antonym of derision.