What is the role of vegetation when a blowout develops into a parabolic dune?
Answer and explanation
Correct answer: Vegetation anchors the horns and allows the centre to advance
A blowout is a wind-eroded depression in sandy ground. Where vegetation survives around its margins, roots bind the sand and stabilize the arms or horns of the developing dune, while the less-vegetated central section migrates downwind. This produces the characteristic U-shaped or parabolic form, so option A is correct; the other choices are unrelated.
Frequently asked questions
What is the correct answer to this question?
Vegetation anchors the horns and allows the centre to advance
Why is this the correct answer?
A blowout is a wind-eroded depression in sandy ground. Where vegetation survives around its margins, roots bind the sand and stabilize the arms or horns of the developing dune, while the less-vegetated central section migrates downwind. This produces the characteristic U-shaped or parabolic form, so option A is correct; the other choices are unrelated.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Bills of Exchange. Topic: Advanced Situations.
