Which word uses the greek root for chef or ruler? ?

The word that uses the uses the Greek root for chief or ruler is "arch".

In conclusion, the Greek root for chief or ruler is "arch".

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16.) true

17.) true

18.) no information in the text

19.) false

20.) no information in the text

  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.