Which of the following is a sign of food spoilage?

A sign of food spoilage is an unusual odor. When food begins to spoil, it undergoes various chemical changes, often due to the growth of bacteria, yeasts, or molds. These microorganisms break down the food components, producing byproducts that may emit foul or off-putting smells. This unusual odor serves as a strong indicator that the food is no longer safe to eat, as it can signify the presence of harmful microorganisms or the breakdown of the food’s natural structure.

Bright color, hard texture, and fresh appearance do not typically indicate spoilage. In fact, a bright color and fresh appearance are often associated with fresh, high-quality food. A hard texture might suggest freshness for some foods, but it’s not a definitive sign of spoilage. Understanding the indicators of food spoilage is crucial for food safety and helps prevent foodborne illnesses.