Uses of the savanna grassland vegetation.

It is used for grazing animals.

It allows growth of the herbaceous layer.

It attracts tourists who bring income.

Explanation:

answer; ///i believe the correct answer is (a) decrease biodiversity;

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.