Sudden fall in the height of mercury column in a barometer forecast the occurrence of

Options

A. rain
B. stroms
C. normal weather
D. sea breeze

Explanation

**Step-by-Step Solution:**

1. **Understanding the Barometer**: A barometer is an instrument used to measure atmospheric pressure. It typically contains mercury, and the height of the mercury column indicates the pressure of the atmosphere.

2. **Observing the Sudden Fall**: When there is a sudden fall in the height of the mercury column, it indicates that the atmospheric pressure is decreasing rapidly.

3. **Interpreting Low Pressure**: A sudden drop in atmospheric pressure means that the area is becoming a low-pressure zone. Low pressure is often associated with unstable weather conditions.

4. **Effects of Low Pressure**: In meteorology, low-pressure zones are typically linked to stormy weather. When the pressure drops, air from surrounding high-pressure areas rushes in to fill the void, leading to strong winds.

5. **Conclusion**: Therefore, a sudden fall in the height of the mercury column in a barometer forecasts the occurrence of storms.

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