What was a historical period that impacted Africa the most?

The model of human settlement suggests that uthe model of human settlement suggests that urban growth is patterned around transportation networks such as railroads and highways. a. burgess b. hoyt c. sauer d. von thunenrban growth is patterned around transportation networks

According ti the following map, what are the most common mineral resources found in the united states?

Alow-pressure belt means the air is cold and dry warm and rising cold and sinking warm and moist