Three cities in northern Brazil grew out of the rubber boom.
One, Belem (Portuguese for 'Bethlehem') in Para State became the main exporting center of the Amazon rubber industry. It's still the main commercial center of northern Brazil. One of its main industries now is mining metals such as aluminum, iron ore, etc.
Two, Manaus ['Mother of the gods'] in Amazonas State has many successful economic industries, including timber and Brazil nuts.
Three, the most important economic industry for Porto Velho in Rondonia State now is cassiterate, which is an ore of tin.
The answer is RUBBER
Trade, of course. As trade grew and more goods were able to be brought in and out of one city, the city grew.
They grew powerful through trade.
True
Rome. Florence and Venice especially grew rich from trade, and as did Genoa to a lesser extent. Rome, though important through most of the Middle Ages and Renaissance, was not a trade city.
Mainly rubber.
Brazil's economy grew at a very rapid rate.
Brazil's economy grew at a very rapid rate.
Brazil's economy grew at a very rapid rate.
Brazil's economy grew at a very rapid rate.
Brazil's economy grew at a very rapid rate.
Brazil's economy grew at a very rapid rate.