What effect does the repetition of the phrase "together, Babe and Year" throughout the poem have on the poem?

im taking test rn i give answers when im done bc i dont wanna give my answers and get you any wrong hold up : )

  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.