Well, the magma in the volcano is boiling... and boiling... and boiling, until, it finally expands enough to erupt.
The answer is: Timber
Brazil has approximately around 3,500,000 square kilometers of forrest, which them had the potential to become the largest timber producers in the world. On average, The timber industry in Brazil produce around $ 73 Billion worth of products annually.
B. Colonialism
I'm not sure But, Please correct me if I'm wrong!!