Answer the following question given this paragraph: 

Even if Laura didn’t try to stop the skateboard, it would stop sooner or later. That’s because there’s also friction between the wheels and the pavement. Friction is a force that counters all kinds of motion. It occurs whenever two surfaces come into contact.


Q: What force occurs whenever two surfaces come into contact?

 Choices:

- tension

- vibration

- gravity

- friction

A:
friction
