Which of the following is a sign of spoilage in food?

A sticky texture is indeed a sign of spoilage in food. When food begins to spoil, it can undergo chemical changes that affect its texture, causing it to become slimy or sticky. This can be due to the growth of bacteria or mold, which often occurs when food is stored improperly or kept for too long. In contrast, a bright color, fresh smell, and proper temperature are generally indicators of food that is still safe to consume. Bright colors in foods like fruits and vegetables typically indicate freshness, while a fresh smell suggests that the food has not yet deteriorated. Additionally, maintaining food at the proper temperature is crucial for preventing spoilage and ensuring safety.