Final answer:
Christianity is the most territorially extensive belief system in the world due to its historical spread through colonization, missionary work, and trade. Other major religions, including Islam and Buddhism, also have significant global followings, but Christianity's reach is the most widespread. The rulers of the Delhi Sultanate in India were followers of Islam.
Step-by-step explanation:
Of all the world's religions, Christianity is the most territorially extensive belief system in the world. With its roots tracing back to the Middle East, Christianity is a monotheistic religion that evolved from Judaism. It spread extensively around the globe through colonization, trade, and missionary work, and as a proselytizing faith actively seeks to gain new adherents.
Christianity is one of the three major monotheistic religions alongside Islam and Judaism, all of which recognize a single supreme God. Together, these religions boast over 3.8 billion followers, with Christianity being the largest. Its spread is so extensive that Christians can be found in every part of the world, making it the most widely practiced religion globally.
The rulers of the Delhi Sultanate in India were followers of Islam, which is also a major monotheistic religion and is considered the fastest-growing belief system, due to its high rate of conversion and fertility. Islam originated in the Arabian Peninsula and, like Christianity, has spread to various regions across the globe.
Hinduism is another major religious tradition, characterized by its polytheistic nature and a pantheon of deities, with over 1 billion practitioners. It is primarily found in India and Nepal, and though it is one of the world's oldest major religions still practiced, its territorial extent is not as vast as Christianity.
Finally, Buddhism is another wide-reaching belief system. While it is a major religion with historical origins in the Indian subcontinent, its extent of followers and geographical spread is not as extensive as Christianity. Buddhism does actively seek more members, and due to underreporting, especially in countries like China, the number of adherents is probably higher than often listed.