Oases were good locations for merchants to stop to take rest, drink water by them and their animals, and to get their provisions of water and food to continue the trip.
There are oasises.
I've heard that merchants and business people's kind of habits, practices and moral values have caused them to turn into Islam. That's a good example however to refute the slander which claims that Islam had spread by sword.
Through merchants and traders from Arabia.
Weathly merchants
Arab merchants
Merchants spread Islam through ways of communication. A Non-Muslim merchant would meet a Muslim merchant and learn about his culture, traditions, and religions. On come occasions, this would result in conversion due to the perceived merits of Islam.
Oasises are found throughout deserts in Africa. Many nomads go to oasises yearly. They go there to collect water for their tribes.
Muslim merchants set up trading posts throughout southeast Asia and taught Islam to people there.
b Its c : cultural diffusion
Yes, they did.
Typically, Arab merchants spread goods from place to place. (That's what merchants do.) However, merchants also facilitate cultural diffusion which allows for religions to move between countries. It was through Arab merchants that Islam disseminated through West Africa, East Africa, and much of Indonesia.
Islam as a religion expanded as the Islamic Empires expanded through conquest and where Islamic merchants met with receptive cultures outside of the Islamic Empires.