Can you show the question because I don’t know what to respond
C. The platypus, which is a mammal, has a bill like a duck and feet like an otter.
"which is a mammal" is an adjective clause. An adjective clause is used to describe a noun and usually begins with one of these words: that, when, where, who, whom, whose, which, and why. In this sentence, the adjective clause begins with "which" and describes the platypus, which is a noun.
The verb "looks" would be in this case a linking verb, since it is helping the reader understand the point of view of the observer. The weather itself is of course not "looking" anywhere.
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