Answer:
I can't see the statements so I can't give a definite answer. However, think of it this way: We know the statement needs to add to the idea that insects are dangerous. So you need to chose the option that presents insects in a negative light or gives a specific reason to fear them. A neutral or positive fact about insects would not support the idea.
I think the answer would be setting because people who read the sentence can relate to the characters in the book. So the setting would cause the rader to think about their own lives.