Costumes play a central role in the celebration of Carnival in Rio de Janeiro, reflecting the city's diverse culture and history. Participants wear elaborate outfits and masks that signify different themes and traditions, contributing to the vibrant atmosphere. These costumes foster a sense of community and allow individuals to express their creativity and identity. The extravagant costumes are not only for entertainment but also symbolize the rich cultural heritage of Brazil, bringing people together in a celebration of joy and unity.