Final answer:
Varus stress pushes the knees together, resulting in a compression force on the lateral side of the knee joint.
Step-by-step explanation:
Varus stress refers to a specific type of force on the knees. It occurs when the force pushes the knees towards each other, resulting in a compression force on the lateral (outer) side of the knee joint. This can happen, for example, when someone squats with their knees turned outwards or when a person walks with their knees close together.