2. What kind of Eco-system is known as sustainable?
a) The one in which all species are in balance
b) The one in which there are no animals
c) The one in which animals feed on each other
d) All of these


Answer :

Answer:

a

Explanation:

Balance means that herbivores have the chance to live and make more, and the carnivores can eat some of the herbivores, to not have an overpopulation.