Well, there's producers and consumers. There is also one provider that is the main source of energy for all living things which is the sun. The sun provides sunlight for the producers to make their own food through photosynthesis then consumers come and eat the producers(plants) and that gives them energy. And then predators come and eat that animal and that provides their energy.
B. Density has been decreased Or D.
i beleive that is the respiratory system but ill double check in a m inute
alright heres all your answers for that test question 1 true
question 2 oxygen question 3 carbon dioxide question 4 true question 5 alvoei question 6 diaphram question 7 respitory system the last 3 are all true i hope i helped
