Lesson eLearning

Which of the following is the main factor that determines the shape of a river basin?

easy MCQ 2 marks Class 9 · Geography · Drainage
  1. (A) rainfall
  2. (B) gradient
  3. (C) tectonic activity
  4. (D) soil type
Answer
(B) gradient

The correct answer is (B) gradient — Step 4: Select option (B) gradient as the correct answer.

Step-by-step solution

  1. Step 1: Identify the options and recall that basin shape is mainly influenced by the topography.
  2. Step 2: Recognise that the gradient of the land (steepness) controls how streams join and how the basin spreads.
  3. Step 3: Compare the other options – rainfall, tectonic activity and soil type – which affect flow but not basin shape directly.
  4. Step 4: Select option (B) gradient as the correct answer.
Common mistake: Confusing rainfall intensity with basin geometry

Concept tested: Basin shape depends on topography

Published · How this solution was prepared and checked

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