2. Scientists think that the movement of crustal plates is caused by a) conveyor belts.
b) pressure in the earths core.
c) the core.
d) convection currents.

Your answer is d. silli hope this ! : ) i left an explanation down below if you need it: a sill forms when hot magma squeezes between layers of rock to form a hardened sheet of rock. a sill is basically a tabular sheet intrusion between old layers of sedimentary rock, volcanic beds, or in the direction of foliation inherent in metamorphic rock. the word sill means a concordant intrusive sheet.

Answerheat and pressure

The best title for the map above would be "earthquakes worldwide from 1900 - 2007". hope this