Which of the following bones also fuses to form the pelvic ring along with the ilium?

The pubis is one of the key bones that, along with the ilium and ischium, contributes to the formation of the pelvic ring. The pelvic ring is a structure formed by the fusion of these three bones, which collectively make up the pelvis. The pelvis serves several vital functions, including supporting the weight of the upper body when sitting and standing, as well as protecting the pelvic organs.

The ilium, the largest part of the hip bone, meets with the pubis at the front of the pelvis. The fusion of these bones creates a stable base for the spine and a framework for the attachment of various muscles and ligaments.

In contrast, the femur is the thigh bone and does not contribute to the structure of the pelvic ring. The scapula, or shoulder blade, is part of the upper body and is not involved in the pelvic structure. The sacrum, while a component of the vertebral column, is intricately connected to the pelvis but is not one of the three bones fusing together to form the pelvic ring. Therefore, the pubis is the correct choice in this context.