Answer:
I am the key that is the hardest to turn
I am a ship that can be made to ride the greatest waves. I am not built by objects, but built by minds. What am I?
I go in dry and come out wet. The longer I stay in, the stronger my surroundings get. What am I?
I give light by night, but not by day. I am wicked but not evil in any way. Wax for the most but always wane; except when I'm out, I stay the same. What am I?
I am the building with the most number of stories.
It is something you make after you've weighed your options.