Rotten food refers to food that has decayed or spoiled due to the growth of bacteria, mold, or yeast. This process often results in unpleasant odors, changes in color, and a slimy texture. Common causes of food spoilage include improper storage, exposure to air, and the presence of moisture. When food becomes rotten, it can pose health risks if consumed. Eating spoiled food can lead to foodborne illnesses, which may cause symptoms like nausea, vomiting, and diarrhea. To prevent food from rotting, it is important to store it properly and consume it before its expiration date.