What consistencies/inconsistencies exist between all three types of mining?

The map above shows where people live in the united states. areas that are darker blue are areas where people live close together. areas that are lighter colors are places where people live farther apart. as a geographer, if you were to study where people live and why they choose to live in these places, which of the six essential elements of geography would you be using?

As water is cooled from 4 c to 0 c its density

Can someone me? i need to have this done as soon as possible! i'm putting 20 points on this!