I think it is present perfect.
Measuring cloud data requires the use of Ceilometers. A Ceilometer is able to record cloud related data such as:
- Cloud height ;and
- Cloud ceiling.
<h3>What other factors are required for cloud measurement?</h3>
The distance and speed travelled by clouds are dependent on the following factors:
- Type of cloud
- Speed of wind
Velocity and Density of the cloud - Presence of moisture, crystals of ice, droplets of water in the cloud
- Distance of the cloud from the surface of the earth etc.
It is key to indicate here that the average speed range that clouds can travel is between 48 and 400 kilometers per hour.
Learn more about clouds at:
brainly.com/question/508705
#SPJ1
The correct answer is D :)
Hope I helped!
