Question

three sisters farming was an agricultural system of companion planting innovated by the iroquois - speaking peoples of the northeast: farmers planted corn, beans, and squash together. the beans used the cornstalks as a trellis to grow on, but how did beans benefit the other two plants in the system? choose 1 answer: a bean shoots reached out and strangled weeds, leaving the way clear for the other companion plants b bean leaves provided crucial shade for the squash, which can be damaged by too much direct sunlight; the shade enabled the squash to develop vital nutrients c bacteria on the roots of beans fix nitrogen from the atmosphere into the soil, fertilizing the earth for the benefit of the corn and squash

Explanation:

Beans have symbiotic relationships with nitrogen - fixing bacteria. These bacteria convert atmospheric nitrogen into a form usable by plants, enriching the soil for corn and squash.

Answer:

C. Bacteria on the roots of beans 'fix' nitrogen from the atmosphere into the soil, fertilizing the earth for the benefit of the corn and squash