Final answer:
The correct verb form to use in the sentence is 'te gustan', which means 'you like'.
Step-by-step explanation:
In the sentence 'A ti te gustan las manzanas', the correct verb form is te gustan.
This verb form is used when talking about things that you like or enjoy. In this case, the subject 'ti' (meaning 'you') is followed by the verb 'gustan' (meaning 'to like'). The verb 'gustan' is used because 'manzanas' (meaning 'apples') is plural.
Here, 'te gustan las manzanas' means 'you like apples'.
Learn more about Verb form in Spanish