What do you mean by rancidity? Mention any two ways by which rancidity can be prevented.

Explanation

### Step-by-Step Solution:

1. **Definition of Rancidity**:
Rancidity is a process that leads to the spoilage of food, particularly those containing fats and oils. It occurs when the fats and oils undergo oxidation, resulting in unpleasant changes in taste and smell. This makes the food unfit for consumption.

2. **Causes of Rancidity**:
The primary cause of rancidity is the oxidation of fats and oils present in food. This oxidation can be triggered by exposure to air, light, or heat, leading to the formation of off-flavors and odors.

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