Question

Under what conditions would the breathing rate increase

Answer 1

$During \: emergencies \: invoking \: fear \: ,anger$
shyness, nervousness and anxiety In a situation of fight or fligh In a condition when oxygen content in air is a bit low or you are surrounded by a relatively high amount of carbon dioxide in air

Answer 2

Breathing rate generally increases during vigorous physical exercises. Other cases may include a situation of flight or fight, during emergencies, and when the oxygen content decreases as in hilly areas or if the carbondioxide content of the atmosphere increases as sitting in a crowded room for long hours with poor ventilation.