This causes your CO2 levels to decrease and your blood pH to increase.
<h3>What is hyperventilation?</h3>
Hyperventilation is rapid breathing in of oxygen and breathing out of carbondioxide.
The various causes of hyperventilation include the following:
When a person hyperventilates they exhale more carbon dioxide than normal. As a result the carbon dioxide concentration in the blood decreases.
While the corresponding drop in H3O+ concentration causes an increase in pH.
Therefore, when you start to hyperventilate before giving a presentation, this will cause your CO2 levels to decrease and your blood pH to increase.
Learn more about hyperventilation here:
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The sentence should be "I had joined the soccer team to meet new friends" if you're looking for a past perfect tense verb, since this is indication it is something that is not repeated.
D. Prewriting and drafting, seems the most correct
Eat healthy and exercise daily