(i) Weathering is responsible for bio-diversity of the earth. The rock particles are broken into fine dust particles and are blown. The forest depends upon the depth on weathering mantles. Biomes and biodiversity is a result of forests and vegetation. Therefore weathering is responsible for the bio-diversity of the earth.

(ii) Mass movements transfer the rock particles down the slope under the influence of gravity. The mass movements that are real rapid and perceptible are as follows:-

• Earth flow

• Mud flow

• Landslide

(iii) Weathering, erosion, transportation, deposition are the various mobile and mighty exogenic geomorphic agents. These agents bring changes on the surface of the Earth.

(iv) Yes. Weathering is the pre-requisite for the formation of soils. It breaks the rocks into fine dust particles or smaller fragments and then the soil formation takes place.