The answer to your question is the first choice or choice A. Bacteria is a decomposer. That would be the only valid choice. If the question didn't say decomposer then all of these choices would be correct, but because it only says decomposers, bacteria would be the correct choice.
The answer is stillbirth. A stillbirth is a death or the loss of a baby before or even during delivery. It usually happens after 20 weeks of pregnancy. It occurs in less than 1 in 100 deliveries.Hope this would help.
The answer is Glomerulonephritis, the patient would show data that suggest they have the presence of that disorder.