Microbes need three things to grow — moisture, air and the right temperature. Removing any one of these, through drying, sealing or cooling, can stop or slow down their growth.
Class 5 Our Wondrous World – Health and Well-being – Chapter 3 The Mystery of Food question answer
Class 5 NCERT EVS Our Wondrous World Chapter 3 The Mystery of Food solutions
For microbes to grow, they need moisture, air and a suitable temperature. These three conditions provide them with the environment to survive and multiply. That’s why preservation methods like drying (removes moisture), airtight packing (removes air) and refrigeration (lowers temperature) are used to prevent food spoilage by making conditions unfavourable for microbial growth.
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