Final answer:
The appropriate verb to fill in the blank is 'recomienda'. It means to recommend.
Step-by-step explanation:
The appropriate verb to fill in the blank is recomienda.
The sentence translates to: She recommends a good movie to her brother.
In this context, the verb recomendar means to recommend. The conjugated form recomienda agrees with the subject Ella (She) in third person singular.
Learn more about Verb conjugation in Spanish