Final answer:
The prominent Asian ethnic group in South America that has been closely associated with the expansion of soybean and orange production in Brazil originated from Japan.
Step-by-step explanation:
The prominent Asian ethnic group in South America that has been closely associated with the expansion of soybean and orange production in Brazil originated from Japan.
In the early 20th century, the Japanese government signed an agreement with Brazil allowing for the immigration of laborers to work on coffee plantations. Many Japanese immigrants remained in Brazil even after their contracts expired, leading to a significant Japanese population in the country.
Today, Brazil is a major exporter of soybeans and orange juice, and the largest concentrations of Japanese people outside Japan can be found in Brazil and Peru.