Humans are warm blooded and can't be cold blooded because of the environment we live in. We can't sit still during the winter and soak up warmth from the sun.
The answer would be A. Methane
A living entity is referred to as an organism. In order of size: cell, tissue,organ,organism.
Mitosis is cell division in to daughter cells with the same chromosome number as the parent cell
Technically there is no direct connection between air pressure and humidity. Humidity is the amount of water vapor in the air or air parcel. Air pressure is its weight of the air in a column, the true connection is in the temperature.