Which component of the body supports movement and is responsible for maintaining posture?

The skeletal system is the correct answer because it provides the framework that supports the body, allowing for movement and maintaining posture. It consists of bones, cartilage, ligaments, and tendons, which work together to create a strong and stable structure.

Bones serve as levers that muscles pull on to create movement, while the arrangement and connection of these bones help to maintain the body's position against gravity. The skeletal system also protects vital organs and provides a site for muscle attachment, which is crucial for coordinated movement.

In contrast, while the nervous system plays a role in controlling movement through signals sent to the muscles, it does not provide structural support. The respiratory system is involved in gas exchange rather than movement, and the circulatory system is responsible for transporting blood and nutrients, unrelated to direct support of posture or movement.