The instrument to measure the speed of wind is called :

Options

A. Aneroid barometer
B. Anemometer
C. Wind vane
D. Odometer

Explanation

To find the instrument that measures the speed of wind, we can follow these steps:

1. **Understand the Options**: We have four options to consider:
- Option 1: Aneroid Barometer
- Option 2: Anemometer
- Option 3: Wind Vane
- Option 4: Odometer

2. **Analyze Each Option**:
- **Aneroid Barometer**: This device measures atmospheric pressure, not wind speed.
- **Anemometer**: This is specifically designed to measure the speed of wind.
- **Wind Vane**: This instrument indicates the direction of the wind, but does not measure its speed.
- **Odometer**: This device measures distance traveled by a vehicle, not wind speed.

3. **Identify the Correct Answer**: Based on the analysis, the correct instrument that measures the speed of wind is the **Anemometer**.

4. **Conclusion**: Therefore, the answer to the question is that the instrument to measure the speed of wind is called an **Anemometer**.

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