Because it was popular duh
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.
They are protest poems because the poet used the poems to express beliefs a bout wars and about the government that led her to wars. They are full of ideological beliefs and are kind of persuasive so they are often considered to be protest poems.
Shannon maguire directed diary 1 and beeban kidron directed diary 2