Option (C) Fuel.
Explanation:-
You can observe other all options except option c that, they are renewable resources. Trees, Water and Wind are renewable resources because they are available till now and even in future. It won't be yet destroy whereas Fuel is Non-renewable resoure which won't be get easily for today and even in future. It gets deplenished. Because, in the formation of Fuel, it take infinity time. So, option c is correct friend..