Answer:
A Elena le gusta leer los libros, pero no le interesa leer las revistas.
Explanation:
A Elena le gusta leer los libros, pero no le interesa leer las revistas. This means: Elena likes reading books, but she's not interested in reading the magazines. Both verbs "gusta" and "interesa" are referring to Elena and her reading preferences, that's why they are conjugated in the third person of the singular. The options "gustan" and "interesan" are incorrect. They would be correct if they were talking about Elena and someone else's reading preferences.
