I think how long and how often.
Answer:
Correct answer is D cultural assimilation
Explanation:
D is the correct answer because it refers to a wide process of total lost of previous cultural pattern, and adoption to the new system of values.
A is wrong because it refers to multiple cultures who are cohabiting in one place.
B is wrong because it would mean that some aspects of previous culture are preserved.
The same goes with C because it refers to people who have different ethnic backgrounds in the family.
The continent name is Africa
A depression in the ground due to a cave collapse or acidic water dissolution of limestone is called a B)sinkhole. The collapse has usually happened on the surface layer of the ground. There are many notable examples of sinkholes which can be found around the world, which have become touristic sites. Sinkholes can be caused because of both natural and artificial processes.
Nuclear power plants require great quantities of water because they need the water for cooling
