Read this sentence.

other alternative medicines remain controversial, but proponents are hopeful of fda approval.

what type of sentence is this?

  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.

a. to introduce the audience to important characters .

b. to inform the audience where the story takes place .

e. to lay out specific details about different plot points.

that is based on your opinion not an answer someone can just give you unless you want to lie on your opinion. no offense wasn't trying to be rude. tip: use words like instead of don't put do not and you get what i mean