Probably B) strenuous exercise. If not B then it's probably A. I don't know for sure though
Chemical methods--It includes ion exchange, precipitation, oxidation and reduction, and neutralization.........
Thermal methods--In this, high-temperature incineration, which not only can detoxify certain organic wastes but also can destroy them....
Biological treatment-- It is of certain organic wastes, such as those from the petroleum industry by a special method called landfarming
Physical treatment-- It concentrates, solidifies, or reduces the volume of the waste. Physical processes include evaporation, sedimentation, flotation, and filtration....
A large class of molecules is called a macromolecule.
If a car of some sort is coming and they have their headlights on they could see to move out of the way that's partly why headlights were ceated