How can we use food appropriately to prevent blank it is important that you also avoid blank

blank 1
contamination
spoilage
wastage

blank 2
overeating
over purchasing
refrigeration

1 - Wastage

2 - Over purchasing

Explanation:

Contamination is a situation where unwanted agents such as bacteria get into food. This leads to spoilage. Storing food properly will prevent spoilage, and one of such ways of preventing bacterial contamination is by refrigeration, therefore avoiding refrigeration in order to make use of food properly cannot be right.  

Avoiding over purchasing will prevent food wastage. Over purchasing means acquiring more than one can use or manage. Since food can get spoiled, it is not advisable to buy more than one can manage, so as not to waste it. Therefore, having more food than one can keep will lead to wastage.

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