3. Swim suit fabrics are designed to have minute ridges and scales se marine animals
4. People walk or sleep on a bed of nails
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Explanation:
3: the minute ridges provide streamlining which provide ease in swimming
4: due to presence of multiple nails, the surface area increases, thereby decreasing the pressure. thus the nails do not puncture the skin
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Explanation:
The minute ridges provide streamlining which provide ease in swimming
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