Answer:
During its first century of existence, Buddhism spread from its place of origin in Magadha and Kosala throughout much of northern India, including the areas of Mathura and Ujjayani in the west.
Step-by-step explanation:
Buddhism began in India but is now practiced by many of the inhabitants of Sri Lanka, Myanmar, and Thailand, where it is often called Southern Buddhism. The followers in Nepal, Tibet, China, and Japan, meanwhile, are said to be adherents to Northern Buddhism.
hope this helps please mark me brilliant if im right htank you ! :3