The answer is increase in food security. The threats to food security and agricultural sustainability are the following: drought, food protection, power disruption, economics, terrorism, chemical pollutants, genetic pollutants, impacts on pollinators, soil erosion, climate alternate, and so forth.
Winston Churchill reluctant to open a western front against Germany because h<span>e remembered the slaughter on the Western Front in World War I.
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C. Separation of powers although I guess it also ties in with checks and balances and the branches of the government
It is A. I googled all of them and A is the only one that didn't have stories written about it.