Final answer:
The metaphor 'the light at the end of the tunnel' signifies the imminent completion or near end of a challenging task. It offers a sense of hope that the struggle or effort is almost over.
Step-by-step explanation:
The metaphor 'the light at the end of the tunnel' in the given sentence indicates the completion of a difficult task. It symbolizes a glimpse of the end or the conclusion that is in sight after a long period of work or struggle.
Since Nathan could see the light at the end of the tunnel, it meant that while the big job was not yet finished, he could see that it was nearing completion, offering hope and reassurance that the end was near.
The meaning of the underlined metaphor in the sentence 'The big job was not yet finished, but Nathan could see the light at the end of the tunnel' is A) the completion of a difficult task.
The phrase 'the light at the end of the tunnel' is a metaphor that represents the end or completion of a challenging or difficult task. It suggests that although the job is not finished yet, Nathan can see the end in sight and is hopeful for its completion.