Which of the following best describes positive camber?

Positive camber is characterized by the tilt of the tire outward at the top when viewed from the front of the vehicle. This means that the top of the tire is angled away from the vehicle's centerline while the bottom of the tire is closer to the centerline. This setup can affect the handling and tire wear of a vehicle.

Using positive camber can help improve stability during cornering at specific angles, but it can also lead to increased tire wear if not correctly aligned to the vehicle’s intended use. Thus, the description of the outward tilt of the tire aligns directly with the definition of positive camber, making it the best choice in this context.