Answer:
The correct answer is - it takes thousand of years to form.
Explanation:
A dune is a mountain of the sand form by the water flow or winds over a long time. It occurs mostly in deserted regions or. Stovepipe is a type of dune formed by the wind. It generally longer on the wind side. Shorter side known as slip face are on the lee of the wind.
The stovepipe dunes are formed by the wind for a long time. The dunes normally take several centuries to thousands of years to form.
Thus, the correct answer is - it takes thousand of years to form.