Answer:
introduces a list, explanation, or quotation that follows an
independent clause.
Explanation:
Answer: adding details to describe Raul’s behavior
Explanation:
The text mentions that Cara tried to remain calm in order to be able to see things from Raul's point of view yet Raul's behavior made that hard to do.
Carla should add details describing Raul's behavior so that the readers can know exactly what it was that Raul was doing that made it so hard for Carla to remain calm. This would paint a clearer picture of the situation to readers.
Can’t catch my breath is an idiom figurative language. The term refers to a set expression or a phrase comprising of two or more words.
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.