How did the teachers of Buddhism spread his message? What happened to Buddhism in
India?

Buddhism was basically transmitted to other nations by teachers, researchers, exchange, resettlement, and communication systems.Buddhism was as of now declining in India by the 12th century, but with the plunder by Muslim intruders it about got to be terminated in India within the 1200s. After the collapse of ascetic Buddhism, Buddhist locales were deserted or reoccupied by other devout orders.