The best answer to this question is:
C. A forest fire that was caused by lightning.
A forest fire could kill for example all the individuals of a certain species in a given area - this would be independent of the population density of the species. All the other factors would affect the population the more, the more dense it is.
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Because you can see all the mountains that are on the world and just understand it better<span />
The correct answer is B. Lava flows, pyroclasts.
Explanation
A volcano is a mountain or hill that has an opening through which gaseous, liquid or solid materials can escape from the interior of the Earth. At the top of this cone, there is a concave formation called crater or chimney. When activity occurs in a volcano it is because it is erupting. Also, when it is erupting, the molten rock that comes from the Earth's mantle, known as magma, comes out. Once the magma comes to the surface, it loses the gases it contains because it evaporates, and when it drains the slopes of the cone it is known as lava, which flows from the top of the volcano. Finally, the waste expelled by a volcano through its crater during an eruption is known as pyroclasts. So, the correct answer is B. Lava flows, pyroclasts.
The humanist scholarship encouraged oceanic exploration as due to the large-scale printing of books, people started gaining knowledge and setting out on oceanic expeditions in order to find new trade routes and satisfy their spirit of adventure.
The factors which motivated the Portuguese, particularly Prince Henry the Navigator, to explore west Africa were to extract and export gold and other valuables from which Portugal could benefit. The other reason was that Prince Henry was fascinated about west Africa as the Portuguese had little knowledge about it.
With the development of the printing press, books were available more easily and were even cheaper. This help in the widespread of new ideas and thoughts in society. People built sturdier ships with this knowledge and set out to explore new oceanic routes to procure spices and other goods at cheaper prices from different parts of the world.
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