Why do you think corn became the major crop of native american people living in different environments?
explain.

After the Colombian exchange, corn spread throughout Europe and was a crop that peasant and even serf families could grow for themselves.

the three roles stated in the dialogue develop the siblings' personalities.

lloyd's personality looks like a trademarketer

dana's personality is afraid from lloyd's behavior and the oldest sister is a decided person who tries to solve any conflict

ba geologist finds four sedimentary rock she determines that no geologic events have shifted the layers she labeles them a,b,c,dbfrom top to bottom