The Hijrah is a significant event in the history of Islam in that it signified an important journey that Muhammad and his followers took in 622 CE. Fearing assassination Muhammad and his followers fled Medina and travelled north to the city of Yathrib. Here they established themselves and the city later became known as Medina Al-Nabi or "the City of the Prophet" and was eventually shortened to its current name just Medina. In Medina Muhammad and his followers suffered hardship to reestablish themselves and survive signifying an important step in the survival of the Islamic faith.
Trade flourished because these progressing empires were developing new ways to produce products and utilize agriculture in their areas, such as Han with silk and Rome with olives and fishing/seafaring. These empires has never had access to goods that were from other areas before the Silk road, causing trade to become immensely popular and relied upon.
Protects us from the ultraviolet rays of the sun. You'll learn more about this in 6th grade! Hope this helps!
Vince is more likely to become friends with<span> Bill, his assigned roommate who is majoring in computer science.</span>