A. Hydrometer
B. Barometer
C. Hygrometer
D. None of these
🧠 Explanation:
Humidity in the air is measured by a hygrometer, a device that calculates the amount of water vapor present. Used in meteorology, agriculture, and indoor climate control, hygrometers help monitor weather conditions, crop health, or home comfort. Understanding humidity is essential for environmental science or farming, as it affects plant growth, human health, and weather patterns. Hygrometers provide precise data, making them vital tools for professionals managing climate-sensitive tasks or for anyone interested in weather forecasting and environmental studies.
