Answer:
Defletion hollows: Defletion hollows are ever wind has removed sand down to a level where a layer of particles is too heavy for the wind to move stabilises the sand and prevent the surface being lowered further. It's also known as blow out dune.
Explanation:
Sorry ,I only know about this so i can't tell u of others
The nebular theory is the justification for the creation of solar systems. What the theory explains are three facts – first fact is that all the terrestrial planets, which are those within the orbit of the Asteroid Belt, are rocky, while those outside it are gaseous. Second fact is that they all orbit within 6 degrees of a common plane. And lastly, is that the planets all rotate in the same direction. The last fact is the reason why the nebular theory is supported. Therefore, the correct answer is all the planets orbit the sun in the same direction. (and roughly on the same plane.)
No by wind speed is the way to determine the strength.
I say true. People would then have to look at the same things over and over agin with nothing new.
