Correct Answer: B

Rationale: A barometer measures atmospheric pressure, which is the weight of the air exerted on the Earth’s surface. Invented by Evangelista
Torricelli in the 17th century, barometers are essential tools in meteorology for weather prediction. Changes in atmospheric pressure help forecasters identify approaching storms, fair weather, or shifts in wind patterns. The two common types are mercury barometers and aneroid barometers, with the latter being more portable and widely used today. Accurate pressure readings allow scientists to model weather systems and understand global climate behavior.

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