Final answer:
The main religions in Eastern Europe are Eastern Orthodox Christianity and Catholicism, with certain regions having significant Muslim populations. The religious practices vary from country to country.
Step-by-step explanation:
Eastern Europe is known for its religious diversity, but primarily, the area is split between Eastern Orthodox Christianity and Catholicism. Countries like Russia, Ukraine, Belarus, Bulgaria, Romania, and Serbia predominantly practice Eastern Orthodox Christianity, while Poland, Croatia, and parts of Lithuania and Latvia are mostly Catholic. Some countries, like Bosnia and Herzegovina and Albania, have significant Muslim populations. It's also important to note that each country in Eastern Europe is unique and religious practices can vary widely within them.
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