The question "What do you like to do in your free time?" translates to "Was machst du gern in deiner Freizeit?" in German. Among the provided responses, the most appropriate ones for that question are:
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Was macht dir für die Freizeit? - This is somewhat correct but sounds awkward; it would be more common to ask "Was machst du gern in deiner Freizeit?".
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Was macht ihr gern in der Freizeit? - This translates to "What do you (plural) like to do in your free time?" which is appropriate and is a variant of the original question.
The other two responses:
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Welche Freizeit machst du? - This is not a suitable response to the question. It translates awkwardly to "Which free time do you do?" and doesn't make sense in this context.
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Was nehmen Sie zum Schlafen? - This translates to "What do you take for sleeping?" and is unrelated to the question about free time activities.
In summary, the best responses are the second one about what "you (plural)" do in free time.