Carbon dioxide. the plants take the carbon dioxide and make oxygen
The seeds she planted in the mud grew quicker because the mud is holding nutrition for the corn. The soil is a good guess to make, but the mud is more dense and moist. The water wouldn't have had more nutrients than the mud, just because the mud holds breakdown matter and other things from other plants.
D is correct the population will increase
Answer:
D. It can act as an enzyme
