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.
Answer:
B
Explanation:
The point of the islamic spring was to get rid of the dictaors. Next, there has been huge economic decrease and an increase of terrorist violence.
Answer:
Yes
Explanation:
Geography skills are very useful in so many different situations and as such, geographers have more than 100 different job titles.
Examples of these skills include;
Ability to read, analyze and construct maps.
Ability to understand and or appreciate the existence of so many diverse cultures.
Ability to solve contemporary issues like urbanization and environmental justice amongst many others.
Wind, water, ice, snow, sand
The most resent one i would say floods!! because they have nearly dubbled since 1900!!
