Koalas benefit from tress because then can climb on them to keep away from danger such as other ground predators, Trees can also serve as a food source for them to eat in day to day life.
The answer is B between respiration and combustion
Anything that says further apart is incorrect. So B is incorrect.
A is correct as near as I can tell.
C is not correct. The particles. I think C is the right answer supplied with the wrong reason. Regretfully, you can't choose it.
Same answer as C for D. Right answer wrong reason.
Answer A.
