Question

Those food items which start getting spoilt in 2-3days they are not preserved

Answer 1

1. bread
2. milk
3. cooked vegetable

etc . follow me and mark as brain list .

Answer 2

Food item which contain fats and oils start getting spoiled in 2-3 days as it oxidises and becomes rancid.

Example-- fish, potato chips , oil , milk and bread containing snack.