Although the passage is not included in the question, it is still possible for us to answer this question based on the options provided. In this question, you are asking for the <em>definition</em> of the word "clouds." In order to provide a definition of a word, we need to focus on what the word explains, or the idea that it wants to convey. The definition should ultimately tell us what an idea "is." In this example, option B describes the word "clouds." Moreover, option C tells us how the clouds react and option D tells us what the effect of the clouds is. However, option A is the only that explains the meaning of the word.
I'm not 1000% sure but I think it means to be soft and look fragile and nice on the outside while on the inside your fierce, strong, dangerous etc. HOPE THIS HELPS!!!!!!!!!!!!!! :)