Answer question in one word or one sentence.
Which type of force is responsible for the high melting point of NaCl?

Explanation

**Step-by-Step Solution:**

1. **Identify the Compound**: The compound in question is NaCl (sodium chloride).

2. **Determine the Nature of the Compound**: NaCl is classified as an ionic compound.

3. **Understand the Forces at Play**: In ionic compounds, the primary forces that hold the ions together are electrostatic forces.

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