Answer:
There was a prince named Siddhartha Gautama who was very wealthy, but he'd never been out the castle walls. When he finally was able to take a look, he was astonished and devastated by the extreme poverty, depression, and sickness in the village. So he decided to give up his princely life and meditated under a tree for seven weeks :O without moving or getting up from his spot. There, he found peace and enlightment through meditation. He traveled to many places in Asia, spreading his teachings about meditation. Many people found peace thanks to his teachings, and that's how Buddhism formed. (Siddhartha was called Buddha.)
Step-by-step explanation:
the person above me explains the spread of buddhism better