Final answer:
The appropriate verb form is interesas. Tú is the subject of the sentence, and the verb form interesas agrees with it.
Step-by-step explanation:
Tú te interesas mucho en mis problemas.
- In this sentence, the appropriate verb form is interesas.
- Tú is the subject of the sentence, which means you are the one who is interested.
- The verb form interesas agrees with the subject 'Tú'.
Learn more about Spanish verbs