Question

which types of drainage pattern is formed when the river channel follows the slope of the terrain?
a. Radial
b. Rectangular
c. Trellis
d. dendritic

Answer 1

Hint:
 In geomorphology, a drainage system or also called a river system is a pattern formed by the flow of rivers, rivers and lakes in a certain catchment area. They are determined by the topography of the earth, regardless of whether an area is dominated by hard or soft rock, and the tilt of the earth.

Complete solution:
The rectangular drainage model was developed in very connected rocky terrain. A radial pattern is created when the current flows in a different direction from the crest or central dome as a structure.
The geometry of the trellis drainage system is similar to that of an ordinary garden trellis. Along the strike valley, smaller tributaries flow from the steep mountain slopes. These tributaries flow into the main river more or less perpendicularly, giving the system a trellis-like appearance. They arise where hard and soft formations exist on either side of the main river and reflect the height that has been enhanced by erosion.
The dendritic pattern develops where the river flow follows the slope of the terrain. A river with its tributaries looks like brackets on a tree, which is why its name is dendritic.

Hence, the correct answer is option D.

Note:
The dendritic drainage model was developed on flat limestone in Central Yemen. The parallel drainage pattern, where small rivers usually flow parallel to each other on a sloping surface with equal rock resistance, can be found in the Aberdare Mountains in Kenya and many rivers in Myanmar.