Final answer:
Option (D), The iliac crest terminates at the anterior superior iliac spine, which is an important bony landmark and attachment point for thigh muscles.
Step-by-step explanation:
The termination of the iliac crest occurs at the anterior superior iliac spine. This rounded bony landmark is felt at the anterolateral hip and serves as an attachment point for muscles of the thigh. Posteriorly, the iliac crest descends to end as the posterior superior iliac spine, which also serves as an attachment for muscles and very strong ligaments that support the sacroiliac joint.
The ilium forms the upper part of the hip bone and its superior margin is characterized by the iliac crest, which extends to both the anterior and posterior superior iliac spines.