<em>Answer:</em>
<em>Paul's muscular fitness would best be improved through </em><em>gymnastics</em><em>. </em>
<em>Explanation:</em>
<em>Gymnastics is an excellent sport that is extremely taxing on the muscular system as it requires the person who performs different gymnastic elements to use all the muscles in their body to be able to actually perform them. For that reason, gymnastics would be the best way of obtaining that.</em>
Answer: To maintain Cellular respiration
Explanation:
The body must take in oxygen so that the blood cells can absorb it. This allows the blood cell to release CO2. Therefore, Inhaling oxygen is necessity for maintaining cellular respiration.
