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.
They lived in small communities and survived by hunting and gathering. ... Aboriginal and Torres Strait Island communities only used the land for things that they needed - shelter, water, food, weapons. They never overused it or damaged it.
B) ASEAN.
The Association of Southeast Asian Nations |
False. Fossils fuels are one of the cause but they are many causes as well.
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