C. The lowering of land surface caused by wind
Deflation is wind activity which also causes rock erosion or transports sand and dirt.
Deflation is also known as aeolian processes and aeolus was a Greek god of wind. So it's wind related. Maybe this will help you memorize it. At least thats how i memorized it.
The correct answer is all of the above. The three choices are all basic components of life that all organisms on earth need to thrive and survive. Water is probably the most important because it is the basic component of life here on Earth.
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