What is China doing to prevent the desertification of its land?

A Digging canals
B Building dams
C Planting Trees
D Dredging rivers

Choose one of the 4

Honestly It could be Planting trees, Dredging rivers, and Building dams.

Explanation:

Not sure if its a select all that apply but any of them would work except digging canals.

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.