1) To support themselves. 2) To support family and children( this includes buying necessities like food,water, and clothes). 3) They have to work in order to survive because other else they would be homeless, etc.
The blood pressure is lowest in the veins.
Hope this helps,
kwrob
What energy transformation takes place when a rabbit digests a carrot?
Chemical energy is transformed into heat and thermal energy.
I believe it is viral, they can not be treated with antibiotics but can be prevents with vaccines.