Answer:
Slavic peoples, Turkic Muslims, Non-Slavic Europeans
Step-by-step explanation:
In the 18th century, the ethnic and religious composition of the population of Russia underwent very significant changes. This, first of all, was facilitated by the expansion of the country's borders, the inclusion of large territories with a diverse national composition (Lithuania, Belarus, the Baltic States, Right-Bank Ukraine, Crimea). For the 1870s, the sources of the Russian Empire provided the following information on the national composition of Russia: Slavs, Balts, Germans, Finno-Ugric peoples, Turks, Mongols, and other peoples.