Why are the arms of a parabolic dune often stabilized?
Answer and explanation
Correct answer: Because vegetation can bind and hold the sand
Parabolic dunes commonly form in coastal or semi-arid areas where vegetation grows on parts of the sand surface. Plant roots bind the sand and reduce wind erosion, so the two arms remain relatively fixed while the less-vegetated central section can migrate downwind, producing a U-shaped form. Option D is correct. Tides, glaciers, and rivers are not the usual reason for arm stabilization.
Frequently asked questions
What is the correct answer to this question?
Because vegetation can bind and hold the sand
Why is this the correct answer?
Parabolic dunes commonly form in coastal or semi-arid areas where vegetation grows on parts of the sand surface. Plant roots bind the sand and reduce wind erosion, so the two arms remain relatively fixed while the less-vegetated central section can migrate downwind, producing a U-shaped form. Option D is correct. Tides, glaciers, and rivers are not the usual reason for arm stabilization.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Recording of Transactions (I & II). Topic: Covers the accounting equation.
