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Dear Student

The answer to your 5th question is -
Water borne disease - Cholera
Food borne disease - Campylobater jejuni found in unpasteurized milk

The answer to your 6th question is -
Food provides us with energy to carry out biochemical reactions in our body and physical well being. If we take a balanced diet, it keeps us away from diseases as well.

For rest of your question ,
Please ask them in different threads to get rapid assistance from our expert.

Regards!