Final answer:
The sentence with an extended metaphor is "Your eyes are stars set in the evening sky, always shining, ever constant, guiding me to you." It develops the comparison over a longer stretch, making it more than a simple comparison or simile.
Step-by-step explanation:
The sentence that contains an extended metaphor is "Your eyes are stars set in the evening sky, always shining, ever constant, guiding me to you".
An extended metaphor is a metaphor that is developed over several lines of text or throughout an entire work. In this sentence, the speaker is comparing someone's eyes to stars, not just in a fleeting manner but in a sustained way, highlighting attributes like constant shining and guidance, much like stars in the sky.
This is in contrast to the other sentences, which are similes or simple metaphors. "Your eyes are like stars, shining in the evening sky, guiding me home" uses the word 'like', making it a simile. "Your eyes remind me of stars in the evening sky, ever shining, ever constant" indicates a resemblance but does not extend or develop the comparison further.