Answer:
The correct answer is oxidation.
Step-by-step explanation:
A chemical procedure in which electrons are lost is called the oxidation process. Thus, when food comes into contact with the air for a longer duration then the molecules of oxygen present in the air produces an oxide layer that leads to oxidation of food. This is due to the fact that food loses electrons and these electrons are acquired by the molecules of oxygen. Thus, food turns unfit to eat and becomes spoilt. The procedure is called oxidation.