Are gases in the atmosphere required for animal life?

Yes, gases in the atmosphere, particularly oxygen and carbon dioxide, are essential for animal life. Oxygen is crucial for cellular respiration, which provides energy for survival, while carbon dioxide plays a role in regulating the Earth's temperature and is utilized by plants during photosynthesis. Additionally, the atmosphere helps maintain pressure and provides a medium for sound and other life-sustaining processes. Without these gases, life as we know it would not be possible.