Hi, please can someone help to explain this question? Thanks!!

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secondary 3 | Biology
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secondary 3 Biology

Hi, please can someone help to explain this question? Thanks!!

Date Posted: 7 years ago

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

I think the first one

Date Posted: 7 years ago

Gerry Ng

7 years ago

Hi, could you explain your answer? The pic you posted is ?? Thanks.