Final answer:
The most common religion in Southwest Asia and North Africa is Islam. It is the youngest of the major monotheistic religions, originating with Abraham and predominant in the region. Islam actively seeks new adherents and is growing rapidly worldwide.
Step-by-step explanation:
The most common religion in Southwest Asia and North Africa is Islam. Islam is the youngest of the major monotheistic religions, which include Judaism, Christianity, and Islam, all tracing their origins back to Abraham. Other religions like Christianity and Judaism are also present in the region, but Islam is predominant and is a significant cultural and political force in the area. Southwest Asia and North Africa, often referred to as the Middle East, is the birthplace of Islam and remains the region where the majority of the population practices this faith. It is a proselytizing religion, actively seeking to gain more adherents, and is the fastest-growing major religion in the world.