Electric charge is a _____ of matter.

Explanation

**Step-by-Step Solution:**

1. **Understanding Electric Charge**: Electric charge is a fundamental aspect of matter that determines how objects interact with each other through electromagnetic forces.

2. **Identifying the Blank**: The question asks to fill in the blank: "Electric charge is a _____ of matter." We need to identify the correct term that describes electric charge in relation to matter.

3. **Defining the Term**: The term that best fits in the blank is "property." A property is a characteristic or quality that something possesses.

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