Which part of the central nerves system causes you to move your body when hurt?

In which of the following relationships is one organism always benefited while the other organism is always harmed

Why is earth's outer core hotter than earth’s oceanic crust? earth’s oceanic crust is denser than earth’s outer core is. earth’s oceanic crust has lava flowing from the mantle. earth’s outer core has a composition of solid iron and nickel. earth’s outer core is deeper within earth than oceanic crust is.

The part of the eye that closes and opens to let light in is .