trading and science advancement
Islam spread from Arabia.
Islam
The religion of Islam.
ISLAM
Islam spread to all corners of the Arab World: North Africa, the Upper Middle East, and Arabia.
By the way people began to listen to his ideas
The Wahhabi movement resulted in the establishment of the first Saudi state in the 18th century and the spread of Wahhabism as the dominant form of Islam in Saudi Arabia. It has also influenced Islamic practices and societies beyond Saudi Arabia, giving rise to conservative interpretations of Islam.
It spread to places in Saudi Arabia and Syria
I don't know, this is why I'm having trouble too.
Check the map. Islam was created in, and spread from, Arabia. Those countries closest to Arabia, of which Egypt is certainly one, were the first to feel the weight of Islamic armies.
75 to 100 years
Yes, the spread of Islam can be considered an example of expansion diffusion, where a trend or idea expands outward from its hearth through a variety of means, such as trade, conquest, or migration. Islam spread from its origins in the Arabian Peninsula across North Africa, the Middle East, and beyond, influencing the culture, language, and beliefs of regions it arrived in.