Mary Jane's death in the comics was often a result of complex storylines and various circumstances. Sometimes it was due to villainous attacks or tragic events specific to the comic's plot.
The way Mary Jane dies in comics isn't straightforward. It could be related to a battle with a supervillain, or it could be a part of a larger, multi-issue story arc that involves many characters and events.
Well, it varies. In some Spiderman comic arcs, Mary Jane survives, while in others, her fate is different. It all depends on the creative direction of the writers and the story being told.