Why is the population density of the southernmost and northernmost areas are low

d.

thist title points out that you are explaining the nature of the u.s. government. it is the most specific. a representative government consists of a government where decisions are taken according to a voting system. the most essential aspect of a representative government is found in the different structures where voting rights are granted to different groups of people. for example, voting for governor, mayor, president, local police chief etc.

could you go a bit more in depth with you question? it's quite hard to understand. as soon as you do that i will be glad to : )