Answer:
...Islam spread through regions through military conquest and trade
Step-by-step explanation:
Islam which is one of the religions found on earth has been in existence as old as man. It was majorly practiced in the middle east-precisely Saudi Arabia before it started to spread to other regions.
To achieve this, the engage is Jihad (a war) where regions are conquered and its people subjugated to the religion as a state religion. This is common in the North African region where mot of the countries were converted to Islamic country due to the conquest. Also, trade contributed in its spread in region where they were unable to conquer.