"To do / to make" — the verb French uses for sports, hobbies, and most leisure activities. Je fais du sport, je fais de la natation, je fais des courses. Irregular, with one big surprise: vous faites, not vous faisez.
Three things to internalise. One: faire is irregular. Je fais, tu fais, il/elle fait all sound identical (/fɛ/) — only spelling distinguishes them. The plurals: nous faisons /fə.zɔ̃/, vous faites /fɛt/ (not faisez!), ils/elles font /fɔ̃/. Two: with sports and activities, faire takes a partitive article (du sport, de la natation, de l'équitation, des courses). You'll learn the partitive system properly in Skill 06 — for now, just notice that the article changes depending on the activity. Three: don't translate "I play sports" word-for-word. Jouer is for specific games and instruments only (jouer au tennis, jouer de la guitare). For the umbrella concept, it's faire.
Which form fits the blank?