Because they might not be able to make money or just physically go and get a new house.
Always think better. For example think of it this way, you may not be alive tomorrow, appreciate what you have.
Also you can just do what you want, once you die, you cant do the things you wanted.
Answer:
It goes to the lungs for oxygenation via the pulmonary artery
I believe the last answer is correct because this will enable you to measure in percentages the accuracy in order to decide when the accuracy increased.
