Concept:Rainfall is measured using a specialized instrument designed to collect and quantify precipitation.
Explanation:A rain gauge is used to measure the amount of rainfall.
It typically has a metal cylinder with a circular funnel on top.
The funnel’s rim diameter is usually 20 cm.
Raindrops are collected in the cylinder and then measured using a measuring glass.
Rainfall is recorded in millimeters or centimeters.
Snowfall can also be measured by melting the snow into liquid and then measuring it.
Other options: Hygrometer measures humidity, Hydrometer measures liquid density, Barometer measures atmospheric pressure.
Thus, the correct instrument for rainfall is the rain gauge.
Answer:C. Rain gauge
