Answer:
Islam spread through military conquest, trade, pilgrimage, and missionaries. Arab Muslim forces conquered vast territories and built imperial structures over time. The Sufis made untiring, selfless and incessant struggle for the spread of Islam. They devoted their lives and gave up their homes to champion the cause of Islam in a miraculous way. They came from Central Asia and the Arabian Peninsula in order to establish an Islamic society. Also, After the advent of Islam in the Arabian Peninsula in the 7th century, Islam started its expansion towards eastern regions through trade encouraged by the development of the maritime Silk Roads. Muslims were known to have a commercial talent notably encouraged by Islam, as well as excellent sailing skills.