Which one of the following clouds is found at the highest level from the earth's surface?

Correct option is D

The correct answer is (d) Cirrus cloud
Explanation:
· Cirrus clouds form in the upper troposphere, typically at altitudes of 20,000 to 40,000 feet (6–12 km).
· They are thin, wispy clouds made of ice crystals due to extremely cold temperatures at high altitude.
Other clouds form at lower levels:
· Stratus clouds → Low-level clouds (up to 2 km)
· Nimbus clouds → Rain-bearing clouds (low to mid-level)
· Cumulus clouds → Low to mid-level (up to 2 km, sometimes higher but not the highest category)
Thus, Cirrus clouds are the highest-level clouds among the options.