3. Fill in the blanks : (i) The _____areas are thickly populated. (ii) The Aravalis are the examples of____ fold mountains. (iii) The processes associated with volcanic eruption and earthquake are known as_____ processes. (iv) Degradation occurs when landforms of high elevation are ______(v) Waterfalls and deltas are the landforms of ______order. (vi)_____are rich in mineral deposits.(vii)A______ is a flat and relatively low-lying land. (viii) ________plateaus lie between mountain ranges on one side and plains or sea on the other.​