Which form of friction occurs when an object rolls across a surface?

Rolling friction is the correct answer because it specifically refers to the resistance encountered when an object rolls over a surface. This type of friction typically occurs with wheels, balls, or any object that has a circular form in contact with a flat surface. The key characteristic of rolling friction is that it involves the deformation of the objects in contact at the point of touch, leading to less resistance compared to sliding or static friction.

When an object rolls, it experiences less friction than if it were sliding, allowing for greater efficiency in movement. This is particularly important in applications like transporting goods on wheels or in the operation of machinery that relies on rolling elements, such as bearings.