The density wave theory suggests that the spiral arms of the Milky Way Galaxy are the result of a Spiral Density Wave moving around the Galaxy.
The two most common minerals located in Earth's crust are B) Feldspar and quartz
(Earth Science- Geology, the Environment, and the Universe book)
<span>The Soviet Union took advantage of the location of the Baltic nations by establishing naval bases there.
Hope this helped you! :D
</span>
Answer: Transform plate boundaries
Explanation: As transform plate boundary is the surface where the plates present slides from side of each other this is why deep ocean trenches are not adjacent to it. Lithosphere at the transform plate boundary does not get created or destroyed.They are usually found near the sea floor.They are also considered as the main reason behind the natural calamities like tsunami ,earthquakes etc.