Answer:
Integers include positive Natural Numbers and Negative Natural numbers along with number which has no value called Zero.
Positive Integer=1,2,3,4.........Infinity
Negative Integer= -1,-2,-3,-4,...... -Infinity
Height of Mt.Snowy which is above sea level can be represented in terms of Integers = + 15,718 feet
Height of Green Valley which is above sea level can be represented in terms of Integers = + 237 feet
As, both Mountain snowy and Green valley are above sea level , so it will be represented by positve Integers.