Answer: Supporting details are reasons, examples, facts, steps, or other evidence that explain the main idea. Major details explain and develop the main idea. Minor details help make the major details clear.
Step-by-step explanation:
Supporting detail: I've driven well on my own, and my excellent grades in school show that I'm responsible enough to have my car. The supporting details in this example are one of the teenager's reasons why they should be allowed to have a car.