1.Three low clouds are nimbostratus, stratocumulus, and cumulus clouds. Three middle clouds are altocumulus, altostratus, and nimbostratus. Three high clouds are cirrus, cirrostratus, and cirrocumulus.

http://www.atmos.washington.edu/gcg/MG/tepps/SPOON/photoen/cm.code.htm

2.The cloud that looks best to me is the nimbostratus cloud because its big and puffy looking.

3. The nimbostratus brings alot of rain.