Altitude sickness which includes nausea, fatigue and heart palpitations occurs due to
In summer, when out side temperature is more than our body temperature, we sweat profusely. The resulting evaporative cooling, similar to what happens with a desert cooler in operation, brings down the body temperature. In winter when the temperature is much lower $37^o C$, we start to shiver a kind of exercise which produce heat and raises the body temperature. They are called.
Which of the following factors cannot be regarded as belonging to a non-living environment
Humus is