Maybe because the skin lacks oils which moisturize the skin. When you put lotion on your skin you moisturize it causing ti to be supple.
mobility because reporduction and homeostastis are caratristics of living things while mobility is not.
Heterotrophic, which literally means "eat others"
These can be predators (animal vs. animal; carnivores), herbivores (animal vs. plant), or decomposers (organisms eating dead/decaying organisms)
B. cerebellum, the cerebellum is responsible for all these as well as maintaining muscle tone