Proof read this please.?

A bison and a piece of gr are both living things. They are similar because a bison moves with its legs and a piece of gr can move when the wind blows. The bison can feel sated if it drinks a whole bunch of water, as does a plant -- if it gets too arid it will die. A plant undergoes a similar process to respiration when it obtains sustenance through its roots. A bison breathes with its lungs. They both grow, excrete,reproduce, and they both need nutrition.