Answer:
Explanation:in the metamorphic process due to the impact of pressure and the collection of many types of crystallization, metamorphic rocks are usually more solid than sedimentary rocks; but metamorphic rock from igneous rock, due to its schist structure, its mechanical properties are inferior to igneous rock
The answer is: by the partial melting of solid rock in the crust or upper mantle.
<em>hope this helps ;)</em>
-- To increase the frictional force between the two surfaces, press them together
harder, or rough up the area of contact with sandpaper or dirt.
-- To decrease the frictional force between two surfaces, decrease the force
with which they press together, or smooth (polish) the area where their surfaces
contact, or make the area <em>seem</em> smoother by lubricating it with grease, oil, air,
or smooth leaves.
The vegetation has been increasing in this region over the years
