Without reading the novel, it's impossible to know for sure. But it's likely that there are characters who represent different attitudes towards love. There could be a skeptic who doesn't believe in love but has to in order to live. And there might be a more romantic - minded character who tries to help the others see the value of love in this life - or - death situation.
I'm not sure specifically as I haven't read this novel. But generally, it might be about the extreme situation where characters are forced to fall in love, perhaps with some kind of threat like death if they don't. It could explore themes of love under pressure, the power of emotions, and the consequences of not following the 'fall in love' path.
Well, it's very likely to die. When you fall from such a height, the force of the fall is tremendous. Your body is not built to withstand that kind of sudden impact. Bones can break, and there could be massive internal bleeding. Also, the head is especially vulnerable. Even if you survive the initial impact, the resulting damage could lead to death due to complications later on.
Yes, a four-story fall can be deadly. The impact on the body from such a height can cause severe trauma to vital organs and bones, resulting in death. Also, the way a person lands and the surface they land on can greatly affect the outcome.