The three most practiced religions in Europe are Christianity, Islam, and Judaism in that order. Many Europeans are also non-religious, and if that counted as a religion, it would place second in number of practicers.
depressed
Plenty of religions are practiced in Puerto Rico, but the biggest i would say Catholic.
The premise of your question is wrong as many would classify 'Islam' as a major religion and it is primarily found in the Middle East, North Africa and parts of Asia. If you were to ask, 'Why were many of the major denominations of Christianity born in WE,' then that would get another answer.
I suppose your question is 'What are three monotheistic religions?' An answer would be: Christianity, Islam, and Judaism
Mainly, most major religions and scientists.
Shinto and Buddhism are the major religions in Japan. Most Japanese people do not define themselves as following only one or the other, but tend to incorporate elements of both in their spiritual life, so it would be very difficult to say which is the one major religion.
Blends beliefs and practices from a diverse set of local religions
The five major world religions that are monotheistic are Judaism, Christianity, Islam, Sikhism, and Bahá'í Faith. These religions believe in the existence of one supreme deity or god.
The three major missionary religions are Christianity, Islam, and Buddhism. These religions actively seek to spread their teachings and beliefs to people around the world through missionary activities, preaching, and conversion efforts.
Charles Martel stopped the advance of Islam into Europe. Had the Muslims continued to advance at the same pace they had up to that point, Christendom would have been subjugated within his lifetime and Christianity would have been a minority, clandestine religion in Europe.
General Mitchell saw the Alaska is centrally located to the major centers of Asia, Europe and North America just by viewing the globe.