Answer:
(i) Dendritic: The dendritic pattern
develops where the river channel follows the slope of the terrain. The stream
with its tributaries resembles the branches of a tree.
(ii)
Trellis: A river joined by its tributaries at approximately right angles develops
a trellis pattern. A trellis drainage pattern develops where hard and soft
rocks exist parallel to each other.
(iii) Rectangular: A rectangular drainage pattern develops
on a strongly joined rocky terrain.
(iv)
Radial: A radial pattern develops when streams flow in different directions
from a central peak or dome like structure.
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