Answer:

1. Food preservation is an important skill as it is used to properly prepare and enhance food in both taste and quality while preventing it from decaying/spoiling the food that easily.
2. If we buy wisely we can get or buy the foods that is enough just for a day. Because if we buy foods that are more that enough for a day these can lead to food spoiling.
3. Temperature: The temperature at which food is stored is very critical to shelf life.  

Moisture: It is recommended to remove moisture when storing foods.  

Oxygen: Foods store best when oxygen free.  

Light: Light, a form of energy that can degrade the food value of foods.