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_________________ form the basic diet of mankind.

Cereals form the basic diet of mankind.

Explanation. Cereals are the plants of the grass family that is cultivated for their edible components. Their starchy edible seeds form the major source of diet for more than half of the world’s population. They form the staple diet for a large number of people. Rice, wheat, barley, millets, oats, and maize are the major cereal crops grown throughout the world.