When food is consumed, most of the energy goes to the organism that eats it. And so, as another organism eats the other, it will only get a small portion of the energy that is left and so on.
The answer that would best complete the given statement above is the term NICHE. Each specie has a role in an ecosystem to make it balanced. And an example of this is when s<span>mall monkeys and squirrels both eat nuts and live in tree tops. Hope this answers your question.</span>