I believe you are asking about the "triangle" we were tought a simple triangle. Cells at the bottom because there are the most of them, tissues next, organ next, and organ system at the top. So I believe the answer you are looking for is Organ System.
D because it helps to get the thing that there choking on out of them
Answer:
I would say the answer is A.
Explanation:
I think the answer would be no