Final answer:
The point or structure in the body that is located farthest laterally would be the tip of the thumb. This is due to the upper limb's lateral rotation during development, positioning the thumb as the most lateral part compared to the little toe, coxal region, or ear.
Step-by-step explanation:
The structure in the body located farthest laterally would be determined by considering the anatomical position of different parts in relation to the midline of the body. In anatomical terms, lateral refers to the side or direction toward the side of the body. When considering the options provided, the little toe and the thumb are the most lateral points mentioned. However, since the upper limb rotates laterally by 90 degrees during development so that the thumb points laterally, the tip of the thumb (or the pollex) is the point that stands furthest lateral from the body's midline. In contrast, the little toe (digit 5 of the foot) is also lateral but considering the overall body frame, hands generally extend further laterally than feet.