 
<translate> Ihe dị mkpa ga-enyere anyị aka ịza ajụjụ a bụ: N'oge oyi nke afọ ahụ, Gerry nwụrụ na mberede n'ihi ọrịa kansa ụbụrụ, Holly wee ghọta otú o si hụ ya n'anya nakwa na esemokwu ha abaghị uru ọ bụla. N'ihi ya, azịza ya bụ ọrịa ụbụrụ. <eng> The important part for answering this question is: By winter that year, Gerry suddenly dies of a brain tumor, and Holly realizes how much he meant to her as well as how insignificant their arguments were.
Therefore, the answer is of a brain tumor. 