A behavior must affect an organisms fitness and have a genetic basis.
Carbon is the only element that can form so many different compounds because each carbon atom can form four chemical bonds to other atoms, and because the carbon atom is just the right, small size to fit in comfortably as parts of very large molecules.
I believe that the reason we dream is because our brains are still living while we sleep.
I believe the answer is B: Earth's oceans absorb some of the carbon dioxide from the atmosphere.
This should be an example of genetic drift.
The brown spotted deer would spread their genes more than the white spotted ones which would eventually lead to them completely overpowering genetically the white deer in future generations.
