Question

Which layers form earths rigid, mobile tectonic plates?

A) crust and lower mantle
B) inner and outer core
C) upper and lower mantle
D) crust and upper mantle

Answer 1

D. crust and upper mantle

because it is the two uppermost layers that moves the plates to create earthquakes, landslides, etc.

A is wrong because there is another layer in between the two called the upper mantle.

B and C is wrong because they do not contain the crust, the outermost layer of the earth.