Animals get nutrition out of their food
to make new animals or to keep a certain species alive.
animals need water to keep them hydrated, healthy and alive.
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Oxygen.
Trees help to keep our planet alive by converting carbon dioxide into oxygen which is necessary for humans and animals to live.
All of it
Animals and humans eat food to stay alive. Metabolic processes break down the food (plants and animals) to obtain energy, and the materials needed to build and repair the body.
Doctors use curare to help keep animals alive during surgeries. The curare helps to keep the animals respiratory systems going during surgery.
the human society's responsibilities are to rescue, reserve and keep the animals alive
They help keep things (body or animals etc) healthy and alive.
Because scientists have not figured out how to mix DNA and then keep the animal alive.