To answer this question, let's understand the physiological response of the body when the oxygen level in our brain drops and the carbon dioxide level rises.
When the oxygen level in our brain drops and the carbon dioxide level rises, it indicates a decrease in the oxygen supply and an increase in carbon dioxide levels. This can happen due to various reasons, such as holding our breath, being in a poorly ventilated area, or an underlying medical condition.
In response to this, our body triggers a reflex called the "respiratory reflex." This reflex stimulates our breathing pattern to increase the oxygen supply and eliminate excess carbon dioxide.
Option A) Eat - Eating is not the correct response in this situation. While food provides energy to our body, it does not directly address the issue of low oxygen and high carbon dioxide levels.
Option B) Drink water - Drinking water is also not the correct response in this situation. While hydration is important for overall health, it does not directly address the issue of low oxygen and high carbon dioxide levels.
Option C) Run - Running is not the correct response in this situation. While physical activity can increase oxygen intake, it may not be the most effective or immediate solution to address low oxygen and high carbon dioxide levels.
Option D) Yawn - Yawning is the correct response in this situation. Yawning is a reflexive action that helps increase the oxygen supply and remove excess carbon dioxide from the body. Yawning helps to take in a deep breath, which increases the oxygen levels and reduces the carbon dioxide levels in our system.
Therefore, the correct answer is option D) Yawn.