Can someone Describe the 3 main functions of whole grain foods?

1. serve seed next generation.
2. feeds animals, particularly prey. of grain passes through undigested , deposited elsewhere, can grow new stands. prey animals can eaten predators such humans.
3. make money big agri-business take few cents of raw materials, process it, , sell public $$.

seriously, maybe should in textbook or lecture notes see teacher looking for.
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i appreciate answer.

Food & Drink Ethnic Cuisine Next