Three methods are drying, refrigeration and oiling. Drying removes moisture (e.g., chillies), refrigeration slows microbial growth (e.g., milk) and oiling blocks air (e.g., pickles), keeping food safe and fresh for longer periods.
Class 5 EVS Textbook Our Wondrous World Chapter 3 The Mystery of Food question answer
Class 5 Environmental Studies Grade 5 Chapter 3 The Mystery of Food solutions
Food can be preserved in different ways. Drying removes moisture, preventing microbial growth, as in dried chillies or papads. Refrigeration lowers temperature to slow microbe activity, used for milk, vegetables and butter. Oiling forms a protective layer that blocks air, keeping pickles fresh. These methods extend shelf life, prevent spoilage and maintain taste and nutrition for longer use.
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