<span>the answer to this question is refraction</span>
Answer:
The last two options I'm pretty sure
Explanation:
Volcanoes are formed when magma from within the Earth's upper mantle works its way to the surface. At the surface, it erupts to form lava flows and ash deposits. Over time as the volcano continues to erupt, it will get bigger and bigger.
The correct answer is - the Americas.
The Americas from what is known and discovered till now are by far the latest continents that were settled by the people. Even though it is still not clear when exactly did this happened it is in the range between 19,000 and 12,000 years ago as the biggest given and lowest given number by scientists. It is understandable though that people found it hard to migrate in this part of the world since it was cut of by an ocean and the only way that they could migrate was through the Bering Land Bridge which in fact was an icy bridge between the continents and extremely inhospitable place. There is also the large carnivores in North America as a factor that delayed the migration, and of course the ongoing ice age which covered huge portions of North America with glaciers, ice and snow.
Based on geographical analysis, the pair of B countries that share a border is "<u>Brazil and Bolivia</u>."
<h3>Where are Brazil and Bolivia?</h3>
Both Brazil and Bolivia are located in South America continent.
Bolivia is located in the west of Brazil.
Brazil is surrounded by countries like Paraguay, Uruguay, Peru, Bolivia, Colombia, Venezuela, among others.
Hence, in this case, it is concluded that the correct answer is option B. Brazil and Bolivia.
Learn more about geographical location here: brainly.com/question/12790602
