What is the cause of charging ?

Explanation

### Step-by-Step Solution

1. **Understanding Charge**:
- Charge is a fundamental physical property of matter that causes it to experience a force when placed in an electric or magnetic field.
- There are two types of charge: positive charge and negative charge.

2. **Components of Charge**:
- Positive charge is associated with protons, which are found in the nucleus of an atom.
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