Please give examples to analyze the main factors leading to the spread of religion.

A: The main factors leading to the spread of religion are: (1) An obvious way to expand the religious scope of immigrants is through immigration. As a cultural phenomenon, religion is not only reflected in the religious landscape on the ground, but also in the code of conduct and religious consciousness of believers. When followers of a certain religion move from one place to another, they will inevitably bring their faith to a new place. The migration of Christianity has brought about obvious changes in the world's religious regions, and the migration of Europeans has expanded the scope of Christianity many times compared with that before 2000. Especially in recent centuries, the expansion of Christianity has led to the migration of Buddhist and Islamic believers to new places. Most of these immigrants are nomadic people who are forced to enter the mountains and deserts of Asia or Africa. (2) Among various forms of religious communication, the role of religious communication is very important. Religious communication through this form is not only influenced by political and natural factors, but also related to ethnic consciousness, religious concepts, simplicity or complexity of religious ceremonies, flexibility of organizational forms and other factors. In this form of religious communication, there are two situations: ① communication and conversion. Communication and conversion are also common forms of religious communication, which are often related to the degree of contact between the two religions to expand the scope of their beliefs by this form. Especially for the groups with great differences in civilization, the groups in the process of lower civilization tend to transform into Gao Wenming, initially with material exchanges, and then the blending of beliefs becomes more important. The influence of Indian religious culture on surrounding areas and the relationship between the development of Confucianism in China and the history and culture of neighboring countries are typical examples. (2) Organized missions to world religions often develop different institutions and carry out missionary activities according to their own organizational forms. Christianity has highly organized missionary activities. In the first few centuries, the Roman Catholic Church directly engaged in missionary activities, bringing its northerners into the church and ruling their territory. At that time, Catholic missionary activities were carried out under the guidance of specific religious laws, just like later. As a result of this missionary activity, the number of Christians is increasing, and the areas where Christianity prevails are also expanding. (3) Territorial contention When religious forces and political forces merge, religious beliefs are often brought to new territories in the form of territorial expansion. After the establishment of Islam, a series of religious wars not only brought Islamic beliefs to various places, but also had a great impact on the history of Asia, Africa and other continents. (4) The spatial interaction of religions Several religions are interwoven and distributed in a region, and there are roughly the following ways of interaction between them, namely, peace, competition and exclusion. The spatial relationship between religions has also led to the spread of religions to varying degrees. The details are as follows: ① Peace * * * and peace * * * represent the equality and mutual respect of the two concepts. (2) There is still a competitive relationship between competing religions. In this case, every religion is in an unstable state. Exclusion between religions is the most common form of religious relations.