¿le interesa el fútbol a pedro?
sí. le interesa.
sí. te interesa.
sí. le interesan.
sí. se interesa.

First of all, the word sí tells us that this is an affirmative sentence. Although, all the other options start with this word. However, we choose this option because because of the word le and interesa. So le is the indirect object pronoun for the third person singular. On the other hand, since futbol is a singular noun, we must use interesa that comes from the verb interesar. So an Indirect Object Pronoun is a person that receives the action of a verb indirectly. Its purpose is to tell you to whom or for whom something is done. In this sentence, the action is being performed for Pedro, that is, for him. So:

Sí. Le interesa.

you have to see the favorite tv show now in rastro. in this show you will be able to learn a lot of cultural items that let you know how and why the characters act in their own way of living. when you see them acting you will fall in love with the bad guys instead of the good ones. join these characters in live during their stay here in rastro. don´t miss this show which is lately comment by all the people around the world.