Answer:
A. The environment in which they lived influenced their societies and economies.
Step-by-step explanation:
Native American tribes inhabited the land before settlers arrived. Mississippian people were similar to other Native American groups in the pre-contact era because their economy and social life based on their surroundings. They were adaptable according to their environment, which easily accessed to them. Mississippian peoples cultivated corn on Mississippi Valley floodplains and created pottery and earthworks. They were known for making entire cities built on top massive mounds. Most mounds are rectangular, flat-topped earthen platforms, temples established. They lived in settled villages and farmed, that allowed for the growth of populations.