Explanation:

- Abstain: This word means to deliberately choose not to do or have something. It often refers to refraining from an action or practice, especially for moral or health reasons.

- Option 1 - Refrain: This means to hold oneself back from doing something. It is very similar in meaning to "abstain," often used interchangeably.

- Correct Answer

- Option 2 - Reduce: This means to make something smaller in size, amount, or degree. It is not synonymous with abstaining.

- Option 3 - Propose: This means to suggest something for consideration or discussion. It doesn’t relate to abstaining.

- Option 4 - Accept: This means to consent to receive or undertake something. It is opposite to abstaining.