Which of the following is a sign of improper food storage?

Signs of spoilage are a clear indication of improper food storage. When food is stored incorrectly, factors such as temperature fluctuations, humidity, and exposure to contaminants can lead to the growth of bacteria, molds, and other spoilage organisms. This results in visible changes like off odors, discoloration, and changes in texture. Such signs not only indicate that the food may no longer be safe to consume but also suggest that the food has not been maintained under optimal conditions for freshness and safety.

In contrast, other options represent indicators of good food storage practices. Freshness in appearance implies that the food has been stored well, maintaining its visual appeal and quality. Consistency in texture usually reflects appropriate storage conditions, as improper storage might lead to undesirable changes in texture, such as sogginess or excessive dryness. Finally, having the original packaging intact suggests that the food has been preserved properly, minimizing exposure to air and contaminants. This packaging plays a crucial role in prolonging the food's shelf life and maintaining its safety.