Friction is a force that opposes the motion of objects in contact with each other. It acts in the opposite direction to the motion of the object. In the given options, the true statement about friction is that it can make a moving object faster (option C).

Explanation:
Friction can act in different ways depending on the situation, but it generally opposes the motion of objects. However, in some cases, friction can actually make a moving object go faster. This is known as the concept of rolling friction.

1. Friction can stop a moving object:
- When an object is moving on a surface, friction acts in the opposite direction to its motion. This opposing force can eventually bring the object to a stop.

2. Friction can change the direction of a moving object:
- When an object is moving on a curved or uneven surface, friction can cause the object to change its direction. This is because the frictional force acts perpendicular to the surface and can provide a sideways push.

3. Friction can make a moving object faster:
- Rolling friction is the type of friction that can make a moving object go faster. When an object, such as a ball or a wheel, is rolling on a surface, the friction between the object and the surface can actually propel the object forward. This occurs because the point of contact between the object and the surface is constantly changing, resulting in a series of small pushes that add up to a net force in the direction of motion.

4. Friction can change the shape of an object:
- Friction can indeed cause changes in the shape of objects, but this is not a true statement in the context of the given options. Frictional forces can generate heat, which can cause materials to expand or change shape under certain conditions. However, this is not a direct effect of friction on an object's shape during motion.

In conclusion, out of the given options, the true statement about friction is that it can make a moving object faster. Rolling friction is a specific type of friction that can propel an object forward, contrary to the common understanding that friction always slows things down.