Explain how each of the preserving
techniques ensures that the food will not
contain harmful microorganisms.
(a) air drying of foods such as fish
(b) canning of foods such as vegetables
(c) freezing of foods such as meat

Question

Explain how each of the preserving
techniques ensures that the food will not
contain harmful microorganisms.
(a) air drying of foods such as fish
(b) canning of foods such as vegetables
(c) freezing of foods such as meat

cathyangs · Answer

This question sounds like they want you to write a few sentences about each preserving technique. I did some Google-ing, here's a useful resource: http://www.dummies.com/how-to/content/food-preservation-methods-canning-freezing-and-dry.html