The answer is 2) 12 '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
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♫ - - - - - - - - - - - - - - - ~<u>
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➷ The structure that provides the best surface for diffusion to occur is the bronchioles.
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➶ Hope This Helps You!
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➶ Have A Great Day ^-^
↬ ʜᴀɴɴᴀʜ ♡
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