Задание №81015 ЕГЭ Английскому языку

Преобразуйте, если это необходимо, слово «FORM» так, чтобы оно грамматически соответствовало содержанию текста.

Russia is one of the countries with the largest numbers of ethnic groups in Europe, 185 ethnic groups or nationalities have varied population from millions of people to just ten thousand ________________ the smallest group. The ethnic groups or nationalities are spread across the country. They are represented in al the levels of government.