Question

Fill in the sentence with the appropriate possessive adjective.

Mi hermano es ___ amigo.

tus
tú
tu

Answer 1

Tu

Step-by-step explanation:

Tú is a subject pronoun whereas Tu is a possessive adjective.
And tus, would be incorrectly used as it is plural and would be used more in a sentence such as "Mis amigos son tus amigos" My friends are your friends"

Answer 2

Mi hermano es tu amigo.