I think is the third one, because in the giving sentence it says: I don’t like doing sports, so I think the third one fit in for that.
El señor le gusta correr.
A mi me gusta vivir en la playa.
Yo siempre tengo que escribir en la escuela.
El si entiende el español.
Answer:
Both. Depends on the situation.
Explanation:
"Ti" would be you as the object. Mainly after prepositions, "ti" is always used (por ti, para ti, a ti, etc.). "Te" is also for a direct/indirect object and is used when there's no preposition.
