Final answer:
The challenges presented by the locations of major religions in Europe include historical and cultural divisions, influence on politics, and debates about religious freedom. Three countries that border other countries in Europe with different religious beliefs are Spain, Poland, and Cyprus.
Step-by-step explanation:
There are several challenges presented by the locations of major religions in Europe. One challenge is the historical and cultural divisions that still exist in some countries, leading to tensions between different religious groups. Another challenge is the influence of religion on politics, which can create power struggles and conflicts. Additionally, the presence of different religions in Europe has also led to debates and discussions about religious freedom and secularism.