Explanation: Texas has known petroleum deposits of about 5 billion barrels (790,000,000 m3), which makes up about one-fourth of the known U.S. reserves. The state's refineries can process 4.6 million barrels (730,000 m3) of oil a day. The Port Arthur Refinery in Southeast Texas is the largest refinery in the U.S. Texas also leads in natural gas production, producing one-fourth of the nation's supply. Several petroleum companies are based in Texas such as Occidental Petroleum, ConocoPhillips, ExxonMobil, Halliburton, Marathon Oil, Tesoro, Valero Energy, and Western Refining.
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Nomads moved from place to place bringing all of their belongings. They were much more mobile and did not stay in one place for too long. They migrated whenever there seemed to be a shortage of food or other necessities in the area. Hunter/gatherers on the other hand did not move around much. They may have taken days or even weeks hunting/gathering food a ways from their camp but overall they were stationary.
i think it should be either c or d...
in my preference it should be c beacause industrialisation leads to urbanisation and urbanisation leads to physical and expansion growth ..
