Answer and Explanation:
South Africa is said to be the place rich in minerals. Regardless of its rich mineral resources and valuable minerals wealth, it is a land denied of sustenance. Destitution wins in this nation, People are denied from numerous different backgrounds. Some essential reasons are:-  
- Lack of administration: The most genuine explanation behind such a condition. This prompts the working of a confused government.  
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Corruption: African locals are a prey to broad debasement. This debilitates the organization and acknowledges preference.  
-   Tribalism: Africa is a place that is known for tribal. Individuals distinguish themselves as clans, which decreases their job opportunities
-   Lack of skilled workers: The Government can't pay to talented laborers. Consequently they secure positions in Western Countries.  
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Neocolonialism: It tends to be characterized as the continuation of the monetary model of expansionism after a colonized region has accomplished formal political freedom.
 
        
             
        
        
        
Answer:
Answer is C.East china sea.
Explanation:
I hope it's helpful!
 
        
             
        
        
        
Answer:
Migration
Explanation:
They might want to migrate for greener pastures where opportunity are vast and the need of learning new language is important.
 
        
                    
             
        
        
        
Answer:
Option (C)
Explanation:
The sea floor refers to the oceanic crust that are comprised of basaltic rocks. The basaltic rocks contains olivine, feldspar and some pyroxenes that are usually denser than the minerals that are found in the continental crust.
On the other hand, continental crust refers to the rocks that are found in the continental landmasses, often comprised of rocks that are granitic in nature. The minerals such as silicates, feldspars are less dense.
When continental plate are subducted under the oceanic crust, the rocks at greater depths undergoes partial melting as a result of which the rocks melts and forms magma. These magma becomes less dense due to the high temperature and rises up towards the the surface in the over-riding plate.
Thus, as the plate subducts, the rock chemistry changes , thereby making it less dense.
Hence, the correct answer is option (C).