Answer: Adopting a pet dog is a big responsibility.
A topic sentence is one that captures the meaning of the entire passage. It tends to be the first sentence of a passage, and contains its main idea. In this case, the first three options are details about the responsibilities of pet ownership. The last sentence, however, encapsulates this by summarizing the rest of the information.
To be honest, I think it might possibly be the third option. I hope this helps.
Answer:
D.
Year-round schooling costs more money because utilities must be used year-round.
Explanation:
