Which two bones comprise the lower leg?

The lower leg is comprised of two specific bones: the tibia and the fibula. The tibia, often referred to as the shinbone, is the larger and stronger of the two, serving as the primary weight-bearing bone. It plays a crucial role in supporting the body's weight as you walk, run, and perform various activities. The fibula, which is smaller and located alongside the tibia, provides stability to the ankle and contributes to the overall structure of the leg but is not involved in weight-bearing in the same way as the tibia.

Other choices listed involve different bones that are located in other parts of the body, making them unrelated to the anatomy of the lower leg. The humerus and radius pertain to the upper arm, while the ulna and metacarpals are found in the forearm and hand respectively. The femur and patella are associated with the thigh and knee joint. Therefore, the choice of the tibia and fibula is the only combination that accurately represents the bones of the lower leg.