In the formation of metamorphic rocks, what effect do temperature and pressure primarily have? they erode rocks. they create layers. they make rocks smaller. they change existing minerals

The correct answer is option D

Explanation:

The temperature and pressure that is applied to the metamorphic rock changes the assembly of minerals of the current structure of rock. The texture and composition of the metamorphosed rock is extremely different from the parents rock also called “Protolith”. These changes occur in the solid state primarily and causes chemical reaction between the minerals in the rock subjected to high temperature and pressure.  

c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.