Read the passage. Excerpt from "What Makes a Car Run?" (1) How the Gasoline Engine Works (2) All the parts of a car engine work together. An important part of the engine is a hollow metal tube called a cylinder. Tightly fitted inside a cylinder is a solid piece of steel called a piston. (3) It is here, in the cylinder, that air and gasoline mix and that the mixture burns. In which sentence is a supporting detail given?

1. Sentence 1

2. Sentence 3

3. Sentence 2