I would go with C! The gas station near our house stays open late. Adverbial phrases pretty much focus on Why, When, How, and Where.
In that sentence it shows me the WHEN, and WHERE. I hope all is well, and you pass! (: Good luck, rockstar! (:
I'm not sure, but I think it's past perfect. I'd check with someone else before you answer.
The answer is A. It shows that animals depend on this process for oxygen.
Photosynthesis is how Carbon dioxide (what we breathe out) is turned into Oxygen (what we breathe in)
If Photosynthesis never took place Oxygen would run out and animals would suffocate.
