what would make the world end in fire and what would make the world end in ice?

Question

i am doing an analogy of a Robert Frost poem

Answer 1

Fire represents desire and the author thinks that the intensity of desire, passion, longing, greed, etc... is a more likely way that the world will come to an end than ice which represents the cold, bitterness of hate, even though he agrees that both would get the job done.

Answer 2

Heat and cold, respectively.