Answer:
58>13>-35>-51, so A is correct.
Explanation:
Altitude of Snowvale: 13
Altitude of Highbridge: 58
Altitude of Westsilver: -51
Altitude of Springmoor: -35
Decreasing order means from greatest to least.
Obviously, positive numbers are greater than negative numbers, so we put the positive numbers first. 58>13>-35>-51.
(Note that with negatives, a greater number is a number closer to zero!)