Which line of dialogue from Act III, scene i of Romeo and Juliet most foreshadows that Mercutio’s death will lead to other tragic events in the story?

Romeo says, “This day’s black fate on more days doth depend,” meaning that the tragedy of this day will affect what happens on later days. He adds, “This but begins the woe others must end,” explicitly warning that Mercutio’s death is only the beginning of further suffering. This is the strongest foreshadowing of later tragic events.

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