Final answer:
The skeletal system, made up of joints and cartilage, is correctly identified as option b. Skeletal, and it plays a vital role in providing body support and enabling movement.
Step-by-step explanation:
The skeletal system is made up of joints and cartilage.
As part of the human body system, the skeletal system consists of all the bones of the body as well as cartilage and ligaments, providing an internal framework for the body. Cartilage is a type of dense connective tissue made up of tough protein fibers. It is found covering the ends of bones at joints, providing a smooth surface to facilitate bone movement.
Importantly, the skeletal system includes cartilaginous joints like synchondroses and symphyses, which are types of joints held together by cartilage, such as fibrocartilage in the case of symphyses. This system plays a critical role in body support, protection of soft organs, aid in movement, and production of blood cells.