The American and the girl with him sat at a table in the shade, outside the building. It was very hot and the express from Barcelona would come in forty minutes. It stopped at this junction for two minutes and went to Madrid." - Hills Like White Elephants * 10 points 1st person 2nd person 3rd person objective 3rd person limited 3rd person omniscient

there are number of topics. you can pick any one of these topics:

  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.