What's the reason for hyperventilation?

Some causes of sudden hyperventilation include anxiety, fever, some medicines, intense exercise, and emotional stress. Hyperventilation also can occur because of problems caused by asthma or emphysema or after a head injury.

Excessive breathing creates a low level of carbon dioxide in your blood. This causes many of the symptoms of hyperventilation. You may hyperventilate from an emotional cause such as during a panic attack. It can also be because of a medical problem, such as bleeding or infection.

answer for #1 is c

answer for #2 is d

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for future students the answer is b

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-lavira: )