Name the factor on which inertia of a body depends and state how it depends on the factor stated by you.

Explanation

**Step-by-Step Solution:**

1. **Understanding Inertia**: Inertia is defined as the property of matter that resists any change in its state of motion. This means that an object at rest will stay at rest, and an object in motion will continue to move at a constant velocity unless acted upon by an external force.

2. **Identifying the Factor**: The primary factor on which inertia depends is the **mass of the body**.

3. **Explaining the Relationship**: Inertia is directly proportional to the mass of the body. This means that:
- If the mass of the body increases, its inertia also increases.
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