Answer:
Having heard this line in the prologue, the audience can predict that the two lovers will not have a happy ending to their story and not survive at the end.
Explanation:
William Shakespeare's "Romeo and Juliet" revolves around the story of two lovers who stayed loyal to each other despite their family's feuding history. And through this faithful love, the two young characters met a fateful death, choosing death rather than live without the other.
The prologue states "Two households, both alike in dignity,
In fair Verona, where we lay our scene,
From ancient grudge break to new mutiny,
Where civil blood makes civil hands unclean.
From forth the fatal loins of these two foes
A pair of star-cross'd lovers take their life;"
This clearly states that the lovers will meet their deaths, with their love turning "fatal" for them. Moreover, it also reveals that they will die with their own decision, "tak[ing] their life".
Thus, the prologue enables the readers to predict that the lovers will no survive at the end of the story.
