Northwest Passage and Gold
It's "When there is competition for resources"
Islam entered the African continent from North African countries such as Morocco and Egypt, and was one of the first regions to be conquered by the early Arab-Islamic expansion (7th and 8th centuries). From the tenth to the sixteenth centuries, Muslim merchants contributed to the emergence of important kingdoms in West Africa, which flourished thanks to the caravan trade that crossed the Sahara into contact with the steppes and savannas of West Sudan and central Africa.
What are the important geographic features of the Indian subcontinent?
deccan plateau
Eastern ghats
western ghats
indo-gangetic plain
Himalayas
plateau of tibet
indus river
ganges river