What type of joint connects the humerus to the radius and ulna?

The humerus connects to the radius and ulna at the elbow joint, which is a hinge joint allowing for flexion and extension of the forearm. This joint facilitates the movement necessary for various activities, such as lifting and throwing.

The shoulder joint, although it connects the upper limb to the trunk, involves a different anatomical structure and does not connect the humerus to the radius and ulna. The tarsus refers to the group of seven bones in the foot that form the ankle and does not pertain to the connection between the upper arm and forearm. The stifle joint is equivalent to the knee in animals, particularly in quadrupeds, and does not relate to the human anatomy in this context.

Thus, the elbow is the correct answer as it specifically identifies the joint responsible for connecting the humerus to the radius and ulna in human anatomy, facilitating the arm's functional movements.