A food item developed an unpleasant smell and taste, and the elders of the house said that the food has "gone bad". In scientific terms, which of the following could have occurred?
Rancidification
Rancidity refers to the spoilage of a food in such a way that it becomes undesirable (and usually unsafe) for consumption. In other words, it is a process which causes a substance to become rancid i.e. develop an unpleasant smell or taste.