Correct Answer: B

Rationale: A barometer is an instrument used to measure atmospheric pressure, which helps meteorologists forecast weather and study climate patterns. Invented by Evangelista
Torricelli in 1643, the barometer can be of two main types: mercury barometer and aneroid barometer. When atmospheric pressure rises, it typically indicates fair weather, while falling pressure often signals that storms or rain may be approaching. Barometers are also essential in aviation for determining altitude, as air pressure decreases with height. This instrument remains fundamental in both scientific and practical meteorological applications.

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