Both the Qin and Han dynasties were said to have worked on the Great Wall in order to "enhance the ___ of China"​

I think it's protection

observing traffic laws in exchange for driving on the highway.

states

explanation:

as the old saying goes, all politics are local. state and federal governments affect our daily lives in numerous ways. yet, in our federal system, there is supposed to be a balance between federal and state power. as james madison envisioned it in federalist no. 51, “the power surrendered by the people” would be “divided between two distinct governments,” creating a balance of power that would enable the “different governments [to] control each other.”