Ohh my God, it's Hitler! He's back! He's back! Hurry, protect Jon Stewart! He's our most important Jew! what does this quote mean?

is it "means of nourishment"

d understatement

  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.

demonstrative would be the answer.