Yo: canto
Tu: cantas
El/ella/usted: canta
Nosotros: cantamos
Vosotros: cantamos?
Ellos/ellas/ustedes: cantan
Yo: practico
Tu: practicas
El/ella/usted: practica
Nosotros: practicamos
Vosotros: practicamos?
Ellos/ellas/ustedes: practican
Bailar = to dance
Correr = to run
Yo: bailo
Tu: bailas
El/ella/usted: baila
Nosotros: bailamos
Vosotros: bailamos?
Ellos/ellas/ustedes: bailan
Yo: corro
Tu: corres
El/ella/usted: corre
Nosotros: corremos
Vosotros: corremos?
Ellos/ellas/ustedes: corren
True. my friend is puerto rican and i asked him
<h2>
Answer:</h2>
Corres
<h2>
Explanation:</h2>
The sentence cuando juegas al fútbol, corres mucho means when you play soccer, you run a lot. So corres is the more logical answer because this comes from the verb correr that means to run and as you well know you run a lot when playing this sport. This sentence is given in the simple present tense, hence corres is the conjugation of correr that matches the second person singular in informal form (tú) in the simple present tense.