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.
The correct answers are:
- Native American;
- European;
- African;
The ancestry of the people living in Latin America can be traced in general back to three larger groups, the Native American, European, and Black African. This is due to the evolution and history of the region. The original settlers were the Native Americans, but the Europeans colonized the region later on, and brought lot of European settlers with them. The Europeans also brought Black African slaves with them which they used as labor force. The three large groups, over time, grew over their differences and gradually mixed between each other.
Answer:The igneous form of rocks does not include any fossil deposits. Most igneous forms include more than one mineral deposit.They can be either glassy or coarse.These usually do not react with acids.The mineral deposits are available in the form of patches with different sizes.
Explanation:
