Question

4× why does the author introduce the topic with a question like have you ever wondered how roller coasters defy gravity?
a to criticize people who dont understand physics
b to provide evidence of roller coaster design
c to connect with the audience and spark curiosity
d to introduce a fictional character

Explanation:

Asking a question like "Have you ever wondered..." is a common rhetorical device in writing. It directly addresses the reader (connects with the audience) and makes them think about the topic (sparks curiosity). Option A is incorrect as there's no indication of criticism. Option B is wrong because a question alone doesn't provide evidence. Option D is incorrect as no fictional character is being introduced.

Answer:

C. To connect with the audience and spark curiosity