The correct answer is letter D. Anemometer. It is a device that is used to measure wind speed. It is a very common weather station instrument and is available to use and to make. Anemos, from the greek word that means wind.
An anemometer is an instrument that is used for measuring the speed of the wind. It is a common weather station instrument.
Some anemometers are designed to measure both the speed of the wind and the direction of the wind. wind direction is given from where the wind is coming from to where it is going to.
Wind vane on the other hand is an instrument that is used to show the direction of the wind It may be found as part of the anemometer to determine wind's direction.
