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

because he had a big bear belly

answer; they both highlight the power of the situation in determining behavior;