It is a dip-slip fault in which the block above the fault has moved downward relative to the block below.

a. Normal fault
b. Reverse fault
C. Stress
d. Tension

It is a sudden and violent shaking of the ground, sometimes causing grest destruction, as a result of movements within the earth's crust or volcanic action.

a. Reverse fault
b. Normal fault
C. Fault
d. Earthquake​