Answer:
Three things:
-Under processing before canning
-Spoilage before canning
-entrance of water through can seams during cooling
Explanation:
The preservation process is aimed at reducing the rate of spoilage of food products over time.
When adequately processed a time can be given during which the food product is still not spoilt. For example 1 year from date of canning. After this period there is a high possibility of food spoilage.
If a can of peas was bought from a grocery and it is spoilt it is either the peas were not well processed, there was spoilage before commercial canning, or water entered when cooling during canning
