Which of the following is a sign of food spoilage?

• A. A pleasant smell
• B. A change in texture
• C. Visible mold or discoloration
• D. A consistent taste

Answer: (C)

Visible mold or discoloration is a clear indicator of food spoilage. When food is spoiled, microorganisms such as bacteria and fungi can grow, leading to changes in its appearance. Mold is a type of fungus that often develops on food, and it can change the color and texture of the item. This visual cue is critical because it not only signifies that the food is no longer safe to consume, but also indicates that the food's quality has deteriorated significantly.

The presence of mold or discoloration typically means that the food has been contaminated, and consuming it could pose health risks. It's important to visually inspect food for such signs before deciding to eat it.

In contrast, a pleasant smell is generally associated with food that is safe to eat. A change in texture could occur for various reasons, some of which might not necessarily indicate spoilage, such as cooking methods. A consistent taste also suggests that food is within its quality range, provided the taste remains pleasant. Thus, the visible signs of mold or discoloration are the most reliable indicators of spoilage.