Which of the following is NOT a sign of spoiled food?

A fresh appearance is indicative of food that is still safe for consumption and has not started to spoil. This includes characteristics such as vibrant colors, firm textures, and an absence of any unusual odors or mold. In contrast, off odors, discoloration, and mold growth are clear signs that food has begun to spoil and may pose health risks if consumed.

Off odors typically result from the breakdown of food components that lead to rancidity or fermentation, while discoloration often indicates chemical changes occurring within the food, such as oxidation or microbial action. Mold growth is another definitive sign of spoilage, as it indicates the presence of fungi, which can produce harmful toxins. Thus, identifying a fresh appearance helps ensure food safety and freshness, making it the correct answer to the question.