Which two factors cause one part of earth to have summer while another part has winter? a. earth's tilted axis and its revolution around the sun b. greenhouse gases and ozone in the atmosphere c. trade winds and sea breezes d. earth's tilted axis and its rotation around it

When studying the calumet region of illinois and indiana, alfred meyer noted four stages of development as new groups occupied this land. in stage 3, farming communities grew large quantities of crops to sell. a. subsistence agriculture b. conurbanization c. commercial agriculture d. fur trading