One theory suggested that a nomadic, Indo European tribe, called the Aryans, invaded and conquered the Indus Valley Civilization. The eastward shift of monsoons may have reduced the water supply, forcing the Harappans of the Indus River Valley to migrate and establish smaller villages and isolated farms.
Answer: i will go with b the mulism religion becuz Islam is the second largest religion in the world after Christianity, with about 1.8 billion Muslims worldwide. Although its roots go back further, scholars typically date the creation of Islam to the 7th century, making it the youngest of the major world religions. Islam started in Mecca, in modern-day Saudi Arabia, during the time of the prophet Muhammad’s life. Today, the faith is spreading rapidly throughout the world.
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