If fertiliser pollutes a river, the following changes can happen. 1 greater aerobic respiration by decomposers 2 greater growth of producers 3 lower oxygen concentration in the water Which is the correct order for these changes?
- A$1 \rightarrow 2 \rightarrow 3$
- B$1 \rightarrow 3 \rightarrow 2$
- C$2 \rightarrow 1 \rightarrow 3$
- D$2 \rightarrow 3 \rightarrow 1$