Reduction is removal of ____ or addition of ____ .

Explanation

To answer the question "Reduction is the removal of ____ or addition of ____," we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Reduction**:
- Reduction is a chemical process that involves changes in the oxidation state of a substance. It is essential to know that reduction is often associated with the gain of electrons.

2. **Identifying Key Concepts**:
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