The exploration of Marco Polo and the Crusades.
I think the last option sounds right u should prob look up the last option real quick and see
Answer:
The Cold War was important because it split the world into two rival sides that came into conflict with each other in a number of places around the world. This conflict has left us with, among other things, a huge aresenal of nuclear weapons, particularly in the US and in Russia.
Swahili culture is the product of the history of the coastal part of the African Great Lakes region.
By the 8th century, the Swahili people became involved in the Indian Ocean trade. As a consequence, they were influenced by the Arab, Persian, Indian and Chinese cultures.
As well as in the Swahili language, Swahili culture has a Bantu core and has also borrowed foreign influences. This Bantu expansion introduced the Bantu peoples in central, southern and southeastern Africa, regions of which they were previously absent. They gradually evolved to accommodate an increase in trade (mainly with Arab traders), population growth and even more centralized urbanization, developing what would later become known as the Swahili city-states.
As we can see Arab settlers particularly influential along the Swahili coast because they were the Bantu's major trading partner.