<span>The
mechanism establishing natural price by Adam Smith connects with effective
demand and free competition. If you cut the supply of goods, the demand for
them is higher. Because of this, there competition between buyers. Afraid not
get the right product, they agree to buy it at a higher cost. The market price
will rise. When supply and demand are roughly equal, the market value
corresponds to approximately natural.</span>
Out of all those awnsers 6000 BCE is right.
Scientists can determine if oxygen existed in Earth’s Archean atmosphere by looking for oxidized iron in rock. In the beginning, there was only a little to no oxygen in the atmosphere. The oxygen that are being produced by cyanobacteria is only enough for the weathering process. There will only enough oxygen that shall remain in the atmosphere when the rocks at the surface are properly and adequately oxidized. However, as time goes by, evidences said that the amount of oxygen in the Archean atmosphere is actually increasing in a slow steady pace.
