Answer the following question, with explanation first.
The bookend was on a shelf in what location?\nOptions:\n- bookshelf\n- pair\n- school cafeteria\n- library book\n- school library

school library
Shelf is a piece of furniture.

School library is one of the places that have shelves.

School library is one of the places where books are found.

School library is a building or room.

.

Therefore, the answer is school library