I will give brainliest

  b.

there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.

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.

b. have a great

answer; omb;