Answer: The first one is correct.
<u>Qu'est-ce que</u><em> </em>tu veux faire?
Explanation: Some adjectives like <em>gros </em> and <em>petit </em> go before the noun.
<em>Qu'est-ce que</em> is normally said to ask a question. <em>Que</em> just creates a noun clause.
Answer:
Je ne pratique aucun sport.