D! They are both decomposing dead organic matter and metabolizing it through certain pathways to obtain energy! Hope this helped :)
I do believe the answer is B
viruses multiply only in living cells, so I hope this helps <3
You could have made sure the books were the same weight and your friends could have done it at the same time as you
Answer c
Because the lowest one is at the bottom near 5 and the top one is on 25m and for it to be at 11m will be the wrong answer.