Final answer:
The word from the list that best fits the definition is 'va a ser.' It means 'it is going to be.'
Step-by-step explanation:
The word from the list that best fits the definition is va a ser. In the given sentence, the student is asking about the weather conditions when they go to bathe in the sea. The response options describe different weather conditions, and 'va a ser' means 'it is going to be.' The correct answer option is 'Va a ser seco y va a hacer mucho calor,' which means 'It is going to be dry and very hot.'
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