How does staying low to the ground help keep you safe from tornadoes? do they not touch the ground

i need this info for a class project. any thought would be appreciated

By laying low to the ground, you have much less surface area exposed to the wind. The taller you are, the mor the wind will interact with your body.

For an experiment, lay a block of wood flat on your desk and try to blow it with your breath....no take the same piece of wood and stand it on end and blow on it...what happened...the flat piece didn't move and the one on it's end blew over.