Answer:
1) The Big Crunch. 2) The Big RIP.
Explanation:
For The Big Crunch is that's where gravity takes. For The Big RIP is where the expansion of the universe just gets faster until galaxies, planets, stars, atoms and space gets ripped apart.
Many things caused the crash. Taxes were too high, bad bank practices caused a recession, and too many workers went on strike (there were many other causes but thats all o could think of)
Two ways a ocean can affect the coastline by one Making it to what the people eat and also what the people live in. Also it affects the supplies and enviroment
In divergent boundaries, plates move away from one another, often causing volcanic activity. The cooled magma is able to form islands such as the ones on the Aleutian archipelago.
*I don't think any of these are actual types of mountains. <em>Arc contient </em>and <em>Andean</em> aren't even real things.
As for your second question:
There are two main types of rocks in the Earth's crust.
Granite is less dense and rises higher, usually above land in continental crust.
Basalt is denser and so it will sink lower and form oceanic crust.
However, there is a layer of sediment on top of that crust. (sand, gravel, etc.)
