How do volcanic eruptions create rock?

Once the Magma has cooled of it will turn into hard solid rock (or if you put cold water on it)

It has also created our different islands that we have today because of volcanoes.  

Explanation:

Hope that helps

the supermassive black hole is in the middle of the galaxy.

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a