Literature reflected the spirit of twentieth-century america through its experimentation with new approaches and techniques. this literary movement is called a. realism. b. modernism. c. postmodernism d. the harlem renaissance.

by our hard work

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  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.