Describe the democracy created by cleisthenes.

As our current atmosphere formed, the concentrations of various atmospheric gases fluctuated. match each gas with the explanation that best describes how its proportion changed during the evolution of the atmosphere.

At these trading houses we have kept prices low. we have driven out private traders and those who would make the indians suspicious and fearful of us. in doing so, we have earned the good will of the indians. a letter enclosed shows the effect of this. the indians see the advantage of purchasing from us and request that we establish trading houses among them. in one area this is particularly interesting. the congress must know how much we want to control a large stretch of land on the mississippi river. this would allow us to present as strong of a defense on that side of our territory as on our eastern border. we already control what is below the yazoo river. however, the country between the yazoo river and the ohio river belongs to the chickasaw indians. this tribe refuses to sell its land, but they have recently shown a desire to begin farming. this leads to buying goods and comforts. if we grant these desires, we may be able to secure land on the mississippi. now that trade is expanding among the indian tribes, congress may wish to point our citizens in another direction. the missouri river is not well known to us. it crosses a mild climate and offers a route from the western ocean to the atlantic. an intelligent officer and a team of men might explore the whole route of the river to the western ocean. they could speak with natives, find opportunities for our traders, and return with information after two summers. their arms, tools and gifts for the indians would be the primary costs of the expedition. it would benefit our nation to explore this territory because it offers the only easy way to travel across the continent. the interests of trade give congress the power to approve this expedition. learning more about the geography of our continent is another reason to make this voyage. $2,500 is requested for the purpose of extending trade across the united states. this sum will cover the entire undertaking. what did thomas jefferson suggest congress do in response to the native americans?

“dear sir: it is with great reluctance, i trouble you on a subject, which does not fall within your province; but it is a subject that occasions me more distress, than i have felt, since the commencement of the war; and which loudly demands the most zealous exertions of every person of weight and authority, who is interested in the success of our affairs. i mean the present dreadful situation of the army for want of provisions, and the miserable prospects before us, with respect to futurity. it is more alarming than you will probably conceive, for, to form a just idea, it were necessary to be on the spot. for some days past, there has been little less, than a famine in camp. a part of the army has been a week, without any kind of flesh, and the rest for three or four days. naked and starving as they are, we cannot enough admire the incomparable patience and fidelity of the soldiery, that they have not been ere this excited by their sufferings, to a general mutiny or dispersion. strong symptoms, however, discontent have appeared in particular instances; and nothing but the most acitive efforts every where can long avert so shocking a catastrophe.” what’s the central idea?