frnds 20&21 no. plzzzz
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Pg 21 (1) by applying some anticeptic cream (2)- by wear fullslive clothes (3) by using some coil , liquid s such as goodnight etc
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Answer:20. It's necessary for our tidiness and secondly to protect us from bacterial, viral and infectious diseases
21. By wearing full sleeves clothes , cleaning your surroundings etc.
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