Correct answer:
entregas
Entregas is the conjugation of the verb entregar that matches the second person singular in the simple present tense. This tense is used to talk about habitual actions or routines. This tense is also used to describe things that happen now or in the near future. The verb entregar is irregular, so you must learn by heart conjugations of this verb. Finally, we can write this sentence as follows:
Tú entregas los libros