It would be sonar i think
Answer:
Granite
Explanation:
Obsidian is an extrusive rock, as it is formed on the surface of the Earth from lava, which is magma that has emerged from underground. However, granite is intrusive since it is formed from magma that cools and solidifies within the crust of the planet.
Answer:
I’m not sure, but I think flooding makes the most sense?
The Bolsheviks revolted and took over Russia, killing the royal family and starting a new government. While doing so, they surrendered large parts of their land to Germany, including Poland. After the Russian Revolution occurred in 1917, Germany no longer had to fight a war on two fronts, and was able to shift a large portion of their army from the East to the Western Front.
