In this question “ life is a roller coaster. There are so many ups and downs”. What figure of speech is that sentence ?

Interestingly enough, the idea that life has many ups and downs is a metaphor, too. As in the roller coaster metaphor, the idea of ups and downs is not literal as we apply it to our lives.

Explanation:

the answer should be b.

explanation:

it should be b because she researched before writing so it would be in past tense. "the author researches her subject before she had written the first draft.

  this riddles' answer is library.

  the "leaves" are a reference to the books' pages that the library contains; the branches are a network of libraries that connect multiple libraries' collections, resources, and items in a system of a common database, integrating them; the branches' organization are a useful management tool for coordinating the multiple collections many libraries have.