A _____ agent is a substance which can remove oxygen from a compound.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks for a term that describes a substance capable of removing oxygen from a compound.

2. **Identifying the Term**: The term that fits this description is "reducing agent." A reducing agent is a substance that can facilitate the reduction of another substance by removing oxygen from it.

3. **Definition of Reducing Agent**: A reducing agent is defined as a substance that reduces other compounds by either:
- Removing oxygen from them, or
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