If you are looking for a sentence in that paragraph to support the main idea, I think it would be "All it requires is a good pair of sneakers-no cables, stylish outfits, or weights required. The main idea is basically that walking is a good and easy way to begin exercising, and that explains it.
Answer:
<u>Jordan</u> asks Nick in the first chapter if he knows Gatsby
The figurative language used in the passage is a simile .
