The answer is it adds some unexpected hope by showing that people create beauty even amid poverty.
A figurative language is defined, "Words or expression with a meaning that is different from the literal interpretation." These examples may help you on solving the problem you need assistance with.
1)All right, the sky misses the sun at night.
2)Her head was spinning from all the new information.
3)The poorest man is the richest, and the rich are poor.
4)I've told you a million times to clean your room!
5)I'm so hungry I could eat a horse.
However, there are types of figurative language such as metaphor, simile, personification, hyperbole, symbolism.
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The answer is c. He was tired and it was late; it had been a long day. The semi-colon helps distinguish the two separate parts. The part where it says "it had been a long day" doesn't make sense if added by a comma.