Cleo has a vegetable garden and wants to increase the amount of nitrogen in the soil. how can she most likely do this? add several soybean plants to her garden decrease the amount of fertilizers she uses harvest the vegetable plants continuously reduce the number of decomposers that live in the soil

The correct answer is: add several soybean plants to her garden.

Soybean is a legume. Soybean plant has nodules in its roots.  In the root nodules of many legumes, symbiotic nitrogen-fixing bacteria called Rhizobia reside. Once the Rhizobia have established themselves in the root nodules of soybean, they fix atmospheric nitrogen into the soil. The fixed nitrogen in usable form such as nitrate is available to the plants. In this way soil nitrogen can be increased.

I just took the test and the correct answer is add several soybean plants to her garden. A.

can you list the answers so i can answer