Question

why should we substitute costly foodstuffs by cheap and locally available sources of the nutrients?​

Answer 1

Answer:

The recipes must be based on locally available foodstuffs. ... Nuts and oilseeds which are about the cheapest sources of proteins

Explanation:

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Answer 2

Answer:

Because it will save our money.

We can get more protein, vitamin, energy in less price. It will have good impact in our saving and health.