How fast does the crust layer move usually? What is a fault? How big are they?

What happens when too much pressure builds up at a fault?

A fault is a place in between two tectonic plates they are as big as the edge between two continents The crust layer moves at 0.6 inches per year if there is too much pressure at a fault i believe a volcano will appear

Explanation:

The crust moves due to the convection currents in the earth

were they embroiderers?

number 1 is a)