Give one use each of helium and neon.

Explanation

### Step-by-Step Solution:

1. **Identify the Gases**: The question asks for the uses of two specific inert gases: helium and neon.

2. **Use of Helium**:
- **Filling Balloons**: Helium is commonly used to fill balloons because it is lighter than air, which allows the balloons to float.
- **Scuba Diving**: Helium is also used by scuba divers in breathing mixtures. Its low density and low solubility in blood make it safer for deep-sea diving, reducing the risk of decompression sickness.

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