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.
Because Earth's outer core is liquid and S waves cannot travel trough liquids
Hello! The Three-Fifths Compromise addressed the issue of counting the population, so that there would be proper representation. Slaves votes would be counted as three-fifths of a person. With a lot of people in the U.S., it would be pretty much impossible to get the exact population. It was a controversial issue that had mixed opinions by the delegates. There were many of those that argued against slaves being counted at all.
Sun duhhhhhhhhhhh kollllkh said that he had
Answer:
Una frontera es una línea convencional que marca el confín de un Estado. ... Por eso se habla de convención: los diferentes países acuerdan hasta donde llegan sus respectivos límites; al pasar dicho límite (la frontera), se ingresa en el territorio del país vecino. La frontera, por lo tanto, marca una soberanía.
Explanation:
