Final answer:
The best word to complete the sentence about weather in Southern France is 'balmy', which means mild and pleasantly warm. The other options do not fit the context properly.
Step-by-step explanation:
In the context of weather, the most suitable word to complete the sentence is 'balmy'. Thus, the sentence would read: 'The weather in the south of France was particularly balmy for that time of year.' The term 'balmy' refers to mild and pleasantly warm weather, which suits the climate of Southern France. The other options - brassy, bulky, and barmy - don't correctly fit the context of the sentence.
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