Give one example for each of the following.
Non-combustible substance

Answer

**Step-by-Step Solution:**

1. **Understanding Non-Combustible Substances**:
- Non-combustible substances are materials that do not ignite or burn easily in the presence of oxygen. This means they cannot be set on fire under normal conditions.

2. **Identifying an Example**:
- One common example of a non-combustible substance is "stones." Stones do not catch fire and burn, making them a clear example of non-combustible material.

3. **Conclusion**:
- Therefore, an example of a non-combustible substance is stones.

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