Final answer:
The approach to multicultural education adopted by a teacher who creates a unit on Puerto Rico is an integrative approach.
Step-by-step explanation:
The approach to multicultural education adopted by a teacher who creates a unit on Puerto Rico is integrative approach. This approach focuses on incorporating diverse cultures, perspectives, and histories into the curriculum. By studying Puerto Rico, students can explore the rich cultural heritage, history, and contributions of Puerto Rican people. This approach promotes inclusivity, fosters understanding, and prepares students to be knowledgeable global citizens.