Air covers the land, and the sea, and goes way past the earth's surface. Wind is just moving air. Without air there wouldn't be any people in the world. All living things need air to stay alive. Air does more than just help us breath.
Air helps keep the world warm enough to support life.
Air protects us from meteors. Witch burn up in the earth's atmosphere. Therefore they can strike the earth's surface. Wind can blow so slowly and gently that it can barely be felt. But wind you can always fell or it wouldn't be called wind it would be called just air.