<span>If you hold your breath, <span>carbon dioxide </span></span><span>builds up in your blood
The reason for this is:
When you exhale or breathe out, you exert or let out carbon dioxide. So, if you were to hold your breath, it would build up because it is not being exerted.
Hope this helped you!
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Answer:
You won't want to hear this, nor will you believe me..... but NONE of the four options are correct.
Explanation:
* option A -- The end quotation marks are missing after 'itself.'
* option B -- The period after 'best' should be replaced with a colon.
* option C -- The semi-colon is the wrong punctuation.
* option D -- The punctuation is missing after 'best' AND the quotation marks are missing from the quotation.
The correct answers are letter B and D. Contractions and incomplete sentences make the passage seem informal. This is very common in day-to-day communication as it brings about a sense of socializing between the different parties.
