We have to compare the numbers -7 and 15, 771.
As the Rhone River delta is found in a lower point compared to Mont Blanc, this means that the number (-7) should be less than 15,771. This is:
This is equivalent to say that the number 15,771 is greater than -7, or:
Thus, the inequality that correctly compares the elevataions is 15,771 > -7.