D. Wheat
Wheat need a good dry temperature, Asia is not dry, tis very moist
If one of the choices happens to be earthquakes, that would be your best option.
Answer:
C
Explanation:
Despite infrequent rainfalls, erosional and depositional features of running water are important in desert landscapes
ANSWER: "basalt" .
_________________________________________________
I think this would be the Great Wall of China!
although it's actually thought to be much, much longer: over 5000 miles long, if yoiu include natural defensive barriers used in it.