Volcanic activity may cause climate change by
a. blocking solar energy from reaching the earth's surface.
b. shifting the equatorial and temperate zones.
c. increasing the earth's overall temperature.
d. altering global wind and current patterns.

true. earthquakes are felt whenever there is a slip around a fault in the rocks below the earth. this reorientation of faults create sesmic waves and is known as earthquake, the severity of which is measured in richter scale. these are more prominent in hilly regions as the rocks usually form faults to balance the pressures on it.