Q: Fact 1: Decomposition increases the amount of nutrients in the soil. Fact 2: Moisture is needed for bacterial decomposition. Given the two facts above, what are able to increase the amount of nutrients in the soil?

Available choices:
A). Frogs;
B). farms;
C). mussels;
D). bacteria;
E). clams;
F). plants;
G). acid rains;
H). tractors;
The answer is:
D).