D. high and low levels of silica in the different type of lava.
Explanation:
The volcanoes have different types of explosions. Some tend to be highly explosive, some less explosive, some don't have explosions at all, while some have combinations of different eruptions. The reason for this diversity in the eruption types is mostly the composition of the magma, or rather how high is the silica content in it.
Basically, the higher the silica level in the magma the higher the explosiveness, and the lower the silica level the lower the chances of explosiveness. This is the case because the higher amount of silica makes the magma thicker, so the gasses are trapped and they explode, while when the lower silica content makes the magma less thick, so the gasses are not trapped and explosions are lacking.
QUESTION Options:
1) Argentina
2) Brazil
3) Paraguay
4) Uruguay
Answer: Paraguay.
Amerindian ancestry is literally an ancestral lineage of American Indians.
They are Americans whose ancestry belong to India.
The country of Paraguay is a landlocked country which is bordered by Argentina Brazil and Bolivia.
The dominant population can be traced to the Indian ancestry.
The correct answer is - A. San Andreas Fault.
The San Andreas Fault is stretching alongside the western coast of the United States. It is a result of a divergent plate boundary, where the westernmost part of the country is slowly moving away from the North American mainland.
As it moves more and more, this part will come to a situation where the crust will be much thinner and easier to crack under the high pressure, temperatures, and magma from the mantle layer bellow. As this stats to happen, the region, already pretty active geologically, will become even more active geologically, and the stress on the crust will be result in very often and strong earthquakes.
1. Equatorial Africa<span> is an ambiguous term that sometimes is used to refer to </span>tropical Africa<span>, or the region of </span>Sub-Saharan Africa<span> traversed by the </span>equator<span>.
2. </span>African countries traversed by the equator are:<span><span>
São Tomé and Príncipe</span><span>
Gabon</span><span>
Republic of the Congo</span><span>
Democratic Republic of the Congo</span><span>
Uganda</span><span>
Kenya</span><span>
Somalia</span><span>
Equatorial Guinea</span><span>
Cameroon</span><span>
Central African Republic</span><span>
Rwanda</span><span>
Burundi</span><span>
<span>Ethiopia</span></span></span>
