Hypothesis: the Sun suddenly "disappears". What would happen to Earth?

In about 5.4 billion years it will expand into a red giant, but it does not have the mass to explode. When all of its hydrogen fuel has been expended in fusion, it will expand to 200 times its current size as it starts burning helium. After that it will contract into a white dwarf many times smaller than it is now.

However the expansion of the sun will have long since vaporized all life and water on earth.

In about five billions, as the sun finally uses up its supply of hydrogen, it will begin fusing helium atoms into heavier elements such as carbon. It will shed its higher-energy layers into a planetary nebula, while the core itself will become a white dwarf and then a black dwarf, a cool body of compressed carbon perhaps only a few thousand miles in diameter.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.