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.
Get to bed earlier.Try to find out if there's a guy who likes her and have them get together. Theat'll really make her happy. Listen to quiet music when trying to sleep. It should most definitely help.
I only know it's a process of change of matter but I don't remember the exact types
