When your biceps brachii (upper arm) muscle contracts, ultimately and most directly, what is producing the movement?

It is the proteins present underneath the cells of the biceps brachii, which slide past each other lengthwise, thus shortening the muscle.  

The biceps crosses both the elbow and shoulder joints, its prime role is at the elbow where it flexes the forearm and supinates the forearm. The biceps brachii refers to a bi-articular muscle, that is, it assists in monitoring the movement of two different joints, the elbow, and the shoulder.  

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.

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .