Briefly describe in language that is appropriate for a general audience WHY there is a risk of volcanoes and earthquakes

[answerhappygod]

Briefly describe in language that is appropriate for a general
audience WHY there is a risk of volcanoes and earthquakes is this
region. This should be technically correct and include the major
plate tectonic mechanism, but use plain language (think about
explaining it to your grandma - provided your grandma isn't a
geologist....). Looking at Mt. St. Helens. Advise the
public on the following, answering in complete sentences and
paragraphs and using references as needed.