Why does the study of drainage patterns give more information than a list of rivers?

Correct answer: It indicates slope, rock and geological structure

Correct answer: A. A drainage pattern is the arrangement and direction of a river and its tributaries over the land. A simple list tells us the names of rivers, but a pattern shows how the entire network responds to the relief and structure of the area. For example, streams may follow the general slope, join at characteristic angles, or be controlled by resistant rocks, folds, faults, and joints. Thus patterns such as dendritic, trellis, radial, or rectangular can provide clues about rock type, geological structure and land slope. Option B is wrong because a pattern does not primarily describe river colour. Option C is wrong because boat numbers are a human-use statistic, not a drainage-pattern interpretation. Option D is wrong because temperature alone cannot explain the arrangement of channels. Memory cue: a river list gives names; a drainage pattern gives the landscape’s structural story.