Clouds & Stability MET
Very broadly speaking, cumuliform type clouds are evidence of unstable conditions and stratiform type clouds are evidence of stable conditions. (Stratiform and Stable start with the same letters, if that helps).
Starting from this premise, the remaining questions require you to have a knowledge of the levels of the various clouds - low level, medium (alto) and upper (cirro.) Cumulonimbus and nimbostratus clouds exist over many different layers.
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Allow multiple correct answers
Which of these clouds are evidence of unstable conditions?