rise
Gravity
Crust
you are digging into the crust and lava can eropt
oceanic crust
Hot material is constantly welling up from beneath the crust via convection and forming new crust as it cools. The continuous formation of new crust pushes the old crust outward from the mid-ocean ridges.
rise
In the Crust because it's the only place where there is wind
Erosion happens in the earths crust and it happens because of that layer is exposed to that weather
A river can cause a cliff when moving the soil and rocks out to somewhere else. Volcanoes can make the Earth's crust wider.
As material is removed from mountains by erosion, the range floats upward to regain its isostatic balance. This process can be thought of as "the pull of erosion." As the mountains wear down to a low plain, erosion becomes virtually ineffective and the now this crust achieves isostatic balance; the former mountain belt becomes part of the craton.
erosion
Because erosion only takes place on land
it doesn't
the crust layer.
Suns crust
Rock is the most abundant material in the crust.
At a volcanic island arc, an oceanic plate slides into the mantle and thus oceanic crust is destroyed. The volcanoes add material on to of the crust, but to not cause the crust to expand outward.