Answer:
The free market is an economic system based on supply and demand with little or no government control. It is a summary description of all voluntary exchanges that take place in a given economic environment.
Ocean currents act much like a conveyor belts, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. Thus, currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth's surface.
What was the passage or lesson about?
The geometry term is actually "scale factor", which means the ratio of any 2 corresponding lengths in 2 similar geometric figures.