The respiratory system contains the lungs, so the answer is C. Hope this helps.
A biotic factor is a living thing that has an impact on another population of living things or on the environment. Abiotic factors do the same thing, but they are non-living. Together, biotic and abiotic factors make up an ecosystem. To survive, biotic factors need abiotic factors.
Answer: B, frog
Explanation: I took the quiz and got it right a p e x
Answer:
Go to the first one and there it is
Explanation: