Which model would be classified as a physical model? A. A graph that shows changes in average temperature over the
course of a year
B. An equation that represents how mass affects the force of gravity
C. Marshmallows and toothpicks that are used to show the
composition of a water molecule
D. A mental image of chemical bonds as being like rubber bands

you did not attach the discourse, but i assume it to be the discourse on the origin and basis of inequality among men (the original titile in french is: "discours sur l'origine et les fondements de l'inégalité parmi les hommes"), also know as "second discourse". in this discourse, jean-jacques rousseau emphasizes that private property is the basis of all inequalities.

therefore, what enabled the old regime to maintain as long as it did was private property.