Which statement best summarizes what karl marx predicted regarding the differences in social classes within a society

Karl Marx believed that the economy determined the nature of society. He predicted that society would be reduced down to two social classes: bourgeoisie and proletariat. The bourgeoisie is the class that owns the means of production, in other words, they would be the rulers of the society. The proletariat is the class that labors with out owning the means of production, in other words, the class that is ruled.

What do you mean about innate behavior i don’t get it