Why are parents considered as their babies best learning tools?

you didnt put   question but this passage would be a origin story made to explain life and death and who controls each one

are you gay

explanation:

  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.