It's B, Most them can make or produce their own food.
I think temprature and the right ph level
Answer:
D. I.
maybe its D, I think it might be D
The answer you are looking for is C. Nitrogen. Commonly found as Nitrite
(N3) or Nitrate (N2) nitrogen is a key element required by all life. Nitrogen is most often released back into the atmosphere by micro-organisms during the decomposition of organic matter, and into the ground through decomposition and defecation (Pooping).