It looks like you're asking for a practice activity related to of topic P219 — likely from a Spanish textbook (e.g., Portales or Imagina ) — focusing on "De quién es" (possession with de and possessive pronouns like mío, tuyo, suyo ).
Example 2: Keys belonging to the students.Question: ¿De quiénes son las llaves?Answer: Son las llaves de los estudiantes. Common Mistakes to Avoid p219 estructura 1 de quien es practice it hot
The possessive adjective must agree in number with the , not the owner. It looks like you're asking for a practice