Answer:
A
Explanation:
Physical geography looks at the natural processes of the Earth, such as climate and plate tectonics. Human geography looks at the impact and behaviour of people and how they relate to the physical world.
Air Masses cold temperatures and little moisture. Those who live in northern portions of the United States expect cold weather during the winter months. These conditions usually result from the invasion of cold arctic air masses that originate from the snow covered regions of northern Canada
That means like oxygen for like breathing in your mouth
Probably the cost to maintain it.