The reader can tell from the article that_

Article name: Water cleanup crew

the answer is most likely c. it shows us that the rules that the pigs make can change on a whim whenever it suits the pigs purpose.

hope this

i believe the answer is inference

  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.