The answer to your question is: Enzymes.
<u><em>Enzymes</em></u> chemically alter the make-up of nutrients, changing them into a form that can be readily used by cells.
I hope this helps! :)
-LizzyIsTheQueen
The cycle that is carried out during food chain and energy trophic level is the carbon cycle. The carbon cycle includes the giving off of the carbon dioxide of the organisms which is absorbed by plants through the stomata in aid for photosynthesis or food making. This also includes the energy loss from one organism to another until the eventual decomposition of the animal
your answer is B. it is difficult to see physical and cognitive defects.