The Andes have formed as a result of a subduction zone while the Himalayas have formed as a result of a convergent plate boundary.
Answer:
b. medium
Explanation: i took the test and got it right
I assume you meant which method is least reliable for identification.
If so, the answer would be COLOR, since there are many minerals that are different, yet share similar color. So it wouldn't be reliable to identify a mineral based off it's color.