1. earliest migrants to north america were required to adapt to which initial environmental challenge? a. ice and glaciers b. drought and heat c. rising oceans d. shortages of game and herd animals 2. the maize culture of the southwest was most similar to the pre-columbian culture of the a. cahokia. b. pueblo. c. algonquian. d. creek. 3. before the arrival of europeans, great basin and western plains indians a. developed larger permanent communities. b. responded to a lack of resources by developing mobile lifestyles. c. became dependent on agriculture and maize cultivation. d. created strong trade networks among north american tribes.