Answer:
Tú tienes una directora inteligente, bonita y alta.
Explanation:
Tú tienes una directora inteligente, bonita y alta. This means: You have an intelligent, pretty and tall director. The indefinite articles in Spanish are: un, unos, una, unas. Uno y unos are both masculine, uno is singular and unos is plural. Una y unas are feminine. Una is singular and unas is plural. The sentence refers to "a directora" which is a female director. So the only possible indefinite article is una.
