What is the importance of natural vegetation?

Explanation:

it's a key component in an ecosystem and is involved in the regulation of various biogeochemical cycles (water, carbon, nitrogen)

can convert solar energy into biomass and forms the base of all food chains.

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.