The answer is d a flatworm
It is through respiration
If the food chain was broken, multiple animal species would go extinct. The animals and plants in the food chain will either get out of proportion or die. This is also a major issue considering the fact that if any species falls to extinction, whatever that animal ate will completely overpopulate, considering the fact that the species is extinct. Overall, we need to food chain as a way of life, as well as for population control.
The carbon atom has unique properties that allow it to form covalent bonds to as many as four different atoms, making this versatile element ideal to serve as the basic structural component, or “backbone,” of the macromolecules.
