The answer is for short periods in the prone position. Hope this helps.
The second answer
Temperatures up high need to be warmer near the surface, surface air needs to be humid
The answer to number 12 is mate.
Answer:
Photosynthesis removes CO2 from the atmosphere and replaces it with oxygen.
Explanation:
Photosynthesis removes CO2 from the atmosphere and replaces it with oxygen. By respiration, O2 is removed from the atmosphere and replaced with CO2. However, these processes are not balanced. Some organic matter is not oxidized. (I'm very sorry if I'm wrong but I believe it's that)
