The answer is a)<span> Trade is a recent development in coastal countries.
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This is an incorrect statement as Trade in the coastal countries of Africa goes back more than a millennium.
During the European colonialism, these countries experienced huge trade growth due to the slave trade and exploitation of natural resources.
Most of these countries had major ports which were used as trading posts, stop-overs and major entry points of West Africa.
After the expansion of the Spanish Empire in South America, trade between the two continents flourished and as late as the 19th and 20th century, European powers were still exploiting natural resources in the region.
Today, the region is growing thanks to billions of dollars of investment from China.
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Answer:
The plates converge, diverge or move past each other (sideways)
Explanation:
The earth crust is divided into different tectonic plates. The manner and way this separated plates moves determines the earth structure and topology of the earth. Even this movement causes hazardous event like volcanic eruption.
The plates movement can be converging, diverging or moving past each other .
Convergence occur when two plates collides with each other . The boundary where this phenomenon takes place is called the convergent boundary. The colliding of this plates causes earth deformation and extensive uprising . In the case where a continental plates collides the collision produces mountains . The continental plates are less dense and very active. Continental plates contains more of granitic rocks and this is what contributes to their less dense nature. The collision of this active plates causes an up-welling to form mountain belts . The highest mountain(mountain Everest) was formed through this process. There can also be convergence when oceanic plates collides with a continental plates. The more dense oceanic plates subduct , this subduction leads to introduction of molten magma to the earth surface through volcanic eruption.
At the divergence boundary , two plates move away from each other . This divergent boundary is dominant in the oceanic crust . It can also occur in the continental crust. The plates diverge into two parts . The mid oceanic ridge forming the point of separation. Volcanic eruption introduces magma through the crest of the oceanic ridge to form a new crust.
At the transform boundary, plates moves past each other in a side way manner. The transform movement produces many faults. example San Andrea Fault.
A plate is a section of the Earth's crust and upper mantle.
