Which human body systems work directly together to allow locomotion?

The skeletal and muscular system. The muscle system provides movement and the skeletal provides support and joint flexion/extension.

Explanation:

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.

b) the inside picture would look at a very high temperature in a very low ph