Final answer:
The correct completion of the sentence is 'largo y negro'.
Step-by-step explanation:
The subject of the question is Spanish.
The correct answer to complete the sentence is largo y negro. This means 'long and black' in English, and it correctly describes the color of Estela's eyes.
Therefore, the sentence should be:
'Estela tiene los ojos están en largo y negro'.
Learn more about Completing a Spanish sentence