Answer:
a.
Explanation:
Microeconomic issues concerns only private or public local institutions or general population and don't affect on International Issues and national economic situations of any kind.
<span>B. During the early 1900s, the populations of US cities located on the West Coast were the highest, but by 2000, the populations of cities located in the Midwest became greater than those of the East Coast</span>
Based on the meteorological analysis, the natural process in which the massive amount of material in the atmosphere halt or stops is known as the "GreenHouse Effect."
This is because GreenHouse Effect is a natural process that occurs in the earth's atmosphere.
The GreenHouse Effect occurs when Sun’s radiation comes in contact with the Earth’s atmosphere.
During the contact, some of the massive solar radiation is stopped or halted and returned to space.
The rest of this massive solar radiation, however, is taken and re-radiated by the greenhouse gases.
Greenhouse gases include water vapor, carbon dioxide, methane, ozone, etc.
Hence, in this case, it is considered that GreenHouse Effect is a significant occurrence or process in the Earth's existence.
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When two air masses with different temperatures or humidity levels meet, they do not immediately mix or blend. Instead a line or boundary forms between them. This boundary is called a......<u>front</u>
Explanation:
Due to the different properties, especially temperatures. The less-dense air mass tends to rise while the denser tends to dive at the front causing turbulence. There are four main types of fronts;
- Cold front – bring rainfall and thunderstorms
- warm front – associated with less intense weather
- Occluded front – when a warm air mass is in between two cool air masses
- Stationary front - can be warm or cold but barely moves