They had weapons, their societies were separated, which made it easier for them to take over
The answer is :
The Earth is round all the way to the inner core out.
Explanation:
The regions conquered in the Muslim conquest included rich farming regions in the Maghreb, the Nile Valley and the Fertile Crescent. As is true of the world as a whole, agriculture dominated the economy until the modern period, with livestock grazing playing a particularly large role in the Arab world. Significant trade routes included the Silk Road, the spice trade, and the trade in gold, salt, slaves and luxury goods including ivory and feathers out of sub-Saharan Africa.
