Based on the word root, which means “an official announcement

the correct answer would be d.

that is true because that is something they fulfill for their work.

pengo tupi union iowa wish

  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.