Which of these factors led to the rise of the Kingdom of Ghana?

Gold, trade stability were the main factors. The city of Ouaga was a big centre of trade and Koumbi Sale the capital a prosperous city in Upper Senegal River. Mali conquer the Ghana Empire in early 800 and Soundjata keita became the new emperor.

merchants created new trade routes around Ghana

Explanation: A P E X

experiments.

surveys.

questionnaires.

interviews.

case studies.

participant and non-participant observation.

observational trials.

studies using the delphi method.

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.