Final answer:
The correct answer is option (d) a strong clavicle because, unlike the other options, it is not directly related to walking upright on two legs, and therefore not evidence of early hominin bipedalism.
Step-by-step explanation:
The student asked which of the provided options is NOT evidence of early hominin bipedalism. The evidence of bipedalism in early hominins includes a wide pelvis, the foramen magnum that sits at the base of the skull, and the Laetoli Footprints. These features suggest a skeleton adapted for walking upright on two legs. However, a strong clavicle, or collarbone, is not directly related to bipedal locomotion. Instead, it is typically associated with the ability to use the shoulders and arms for tasks such as climbing or manipulating objects. Therefore, the correct answer to the student's question would be option (d) a strong clavicle, as it is NOT evidence of early hominin bipedalism in the fossil record.