I believe that the answer is:
C.(Hydration)
Hope this helps!
The choice that avoids run-on sentences to present the information clearly and correctly is, "Levi wanted to save the endangered sparrows. He built a birdhouse, and he passed out flyers. He also hung signs to tell people to keep their cats inside." To avoid run-on sentences, the writer limited the use of conjunctions to avoid confusion and instead, divided it into three sentences.
B. Adults must follow the advice they give children
The Babylonians made star charts