Answer:
The exchange of incoming and outgoing radiation that warms the Earth is often referred to as the greenhouse effect because a greenhouse works in much the same way. Incoming UV radiation easily passes through the glass walls of a greenhouse and is absorbed by the plants and hard surfaces inside.

In some cases, integrating diverse groups into a homogeneous society can be beneficial. In a diverse society, you not only learn more about the world, but you open yourself up to more people with different thinking and ideas. However, in some cases, multiculturalism can have adverse effects. There is suck a thing as being “too diverse”. This can cause a lot of conflict in society, and may even make discrimination worse. So it would depend on the extent of the multiculturalism.
Answer:
refused to move, but promise to visit
Explanation:
The two primary reasons for the graying of America
Census of baby boomers
Better medical treatment, living longer
The answer is most likely:
none
This question has choices including none of the above. The first choice seems to be inappropriate wherein it states that prepared core typical of prehistoric modern humans that inhabited this region, and the other two choices doesn't fit the question too. Thus, the answer is none of the above.