3.
what is another word for consumer?
autotroph
heterotroph
producer
decomposer

Producer would be the answer becuase consumer means: "a person who purchases goods and services for personal use" and that is also what producer is. He buys food for personal goods.

The answer is a. i hope this

It's either -limiting factors or -scarce resources but i'd go with my first answer since the food and water are abundant they really aren't scarce