It sounds like you need to read chapter seven, it's the only way you'll know the answer.
Answer:
Islam is the world's fastest-growing religion and it is estimated that by around 2070, Islam would have overtaken Christianity in terms of the world's most dominant religion.
Explanation:
C. Juliet expresses her fear that the promises made between her and Romeo will not last.
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.