Final answer:
The humerus is located in the upper arm between the shoulder and the elbow. Option A.
Step-by-step explanation:
The humerus bone is located in the upper arm region, specifically between the shoulder and elbow joints. The humerus is involved in many important functions, including articulating with the scapula to form the shoulder joint, and with the radius and ulna at the elbow to facilitate arm movement.
Major features of the humerus include the head, the greater and lesser tubercles, the intertubercular groove (also known as the bicipital groove), the anatomical and surgical necks, and the deltoid tuberosity. These structures play key roles in the attachment and movement of arm and shoulder muscles. Option A.