An oxidising agent is a substance which ......... electrons whereas a reducing agent is the substance which ......... Electrons

Explanation

To answer the question, we need to understand the definitions of oxidizing and reducing agents in the context of redox reactions.

### Step-by-Step Solution:

1. **Understanding Oxidation and Reduction:**
- Oxidation is defined as the loss of electrons.
- Reduction is defined as the gain of electrons.

...