Which is an important element in an idea map?
1. bibliography
2.lines connecting ideas
3.list of sources
4.paragraph

i’m alive so yes and the author is a technique idiom

  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.