Final answer:
Islam spread through trade and military conquest.
Step-by-step explanation:
The two primary ways that Islam spread were through trade and military conquest.
Through trade, Muslim merchants traveled across regions, establishing contact with different cultures and spreading Islamic ideas and practices. This facilitated cultural exchange and the dissemination of Islamic beliefs.
In addition, military conquests played a significant role in the spread of Islam. The military expansion of the Islamic Empire allowed for the conversion of conquered territories and the establishment of a unified Islamic state.
Learn more about Spread of Islam