This is accomplished by processes such as: Frost - as water freezes in cracks in the rock it expands and wedges the cracks open further;
(This; is accomplished; by processes such as: Frost - as water freezes in cracks in the rock) (it; expands; ) (it; wedges; the cracks open; further)
This it it
is accomplished expands wedges
by processes such as: Frost - as water freezes in cracks in the rock
the cracks open further