Final answer:
The existence of multiple racial categories in Brazil suggests that race is a social construct, and Brazil places more importance on symbolic ethnicity than strict racial categorization.
Step-by-step explanation:
The existence of multiple racial categories in Brazil, including moreno, mulato, neguinho, and pretinho, which do not have equivalents in the United States, suggests that race is a social construct. Unlike the United States, Brazil places more importance on symbolic ethnicity, which emphasizes cultural and ancestral ties rather than strict racial categorization. This is evident in the country's diverse population and the strong A-f-r-o-Brazilian heritage that dominates the east coast. It is important to note that racial classifications vary across countries and are influenced by cultural and historical contexts.