AHygrometer
BHydrometer
CLactometer
DBarometer`
Answer:
A. Hygrometer
Read Explanation:
Hygrometer
Hygrometer - An instrument for measuring the amount of moisture (water vapor) in the air (atmosphere)
It measures humidity by relating it to the amount of water vapor in the air, temperature, and pressure.
Different types of hygrometers
Psychrometer - An instrument that measures humidity using two thermometers, a wet and a dry thermometer.
Condensation Hygrometer - Humidity is determined by measuring the dew point at which moisture in the air condenses and turns into dew droplets.
Electronic Hygrometer - Measures humidity using changes in electrical resistance or capacitance.
Uses
Weather monitoring - Helps in weather forecasting by measuring the humidity in the atmosphere.
Agriculture - Used in greenhouses to maintain the required humidity level for some crops.