Final answer:
The phrase 'fond' completes the sentence correctly as it means 'melts'.
Step-by-step explanation:
In the given sentence, the phrase 'Maintenant qu'il y a du soleil, la neige fond' completes the sentence correctly. The word 'fond' means 'melts' in English. This makes sense in the context of the sentence as it is stating that now that there is sun, the snow melts.
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