All living things need to live, and energy comes from .

energy; sun or food

Explanation:

If you are taking about animals, the second answer is food i believe.

If you are talking about plants, then it is sun.

But technically, sun helps us as humans and it also helps animals a lot with different things. So maybe just sun. Let me know.

Hope this helps!

feral cats are estimated to eat tens of millions of native animals each night in australia

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products