What term is for the division of political authority among branches of government

This is called "separation of powers." The separation of powers is the term used to describe the separation of authority between the governmental branches.

The native americans, spanish, french and americans all name places in our state. the word “arkansas” came from the quapaw indians, by way of early french explorers. at the time of the early french exploration, a tribe of indians, the quapaws, lived west of the mississippi and north of the arkansas river.