Transitioning from rigid estates (nobility, clergy, peasantry, merchants) to a class-based society with the rise of the bourgeoisie and the proletariat due to the industrial revolution.
If you have found a specific key for this chapter on a GDZ site, evaluate it based on the following: gdz po istorii 9 klass sokolova sotsialnaia struktura
Социальная структура общества. История, 9 класс - ЯКласс Transitioning from rigid estates (nobility
Saves time on structured table-filling exercises common in workbooks. a regional textbook
Standard federal history textbooks for 9th grade are usually authored by Danilov, Kosulina, Torkunov, or Medinsky. "Sokolova" might be the author of a highly specific workbook, a regional textbook, or a set of independent assessment tests.