Answer:
It increases their food supplies due to the complementary effect of each crop.
Step-by-step explanation:
The impact crop mixing had on the food supplies of American Indians in Georgia before the European contact was that, "It increases their food supplies due to the complementary effect of each crop."
Other advantages of crop mixing that aids increase in food supplies are:
It lowers crop failures
It reduces pest infestation
It enhances soil fertility
Varieties of crops are harvested at the end of the harvest year.