The sahara is covered by rocky plateaus, gravel plains, plants, and ergs. what are ergs?

Why is the united states a constitutional republic? why is china, which has a constitution, not one? compare the forms of government in the united states and china.

What occurred during the free banking era? the dollar bill was introduced. the second bank of the united states was established. repaying of loans was not closely monitored. currency varied widely from state to state.

What is the treaty of ghent and what we’re the terms of this treaty?