How does the author use foreshadowing in Year of Impossible Goodbyes?

In Chapter Two, we see the Korean people continue trying to find ways of making life bearable and even fun, although they are oppressed by the Japanese. The pine tree, which is seen as a symbol of this indomitable spirit, is more openly a symbol for Grandfather himself, foreshadowing that he may die soon, as hinted by Captain
Narita.