Lithosphere, hydrosphere, biosphere and atmosphere
The key in the growth of the empire of Meroe was It was located by the Nile within the domains of the kingdom of Kush. It's location made it a crossroads for extensive trade, earning it a great deal of wealth.
They had to keep moving to follow the animals that were searching for water in rhe desertt & they needed water for themselves
The united states power was continuing to grow in the international arena. Previous decades had seen the USA emerge as one of the industrialized country which implied that it could not remain isolated as a result of the dynamics of international commerce. The USA had to protect its interests in the global arena especially trade.
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