18. A performance expectation from physics for elementary school students includes an investigation to compare the effects of interactions between two objects. Which one of the following does not express a cause-and-effect statement?

Group of answer choices

1. Like poles repel.
2. This red car moves faster than that white car.
3. Stronger pushes make cars go faster.
4. Unlike charges attract.
5. Hotter objects transfer heat to cooler objects.