can someone put one of these words in a sentence for me please (congregation, gregarious) not both words just pick any one & put in a sentence.

There was a congregation of the leaders being held in the main hall to decide the new laws for the town.

Explanation:

A congregation is an organized group or gathering, generally in order to decide something

d is the best answer for this question.

  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.