The correct answer is - A. the Amazon Rainforest of South America.
The Amazon rainforest in South America, mostly located on the territory of Brazil, in the northern half of the country, has experienced the biggest deforestation in the world in the two decades between 1990 and 2010.
One of the biggest reasons for this extensive deforestation is that the Amazon is very beneficial for the Brazilian economy, so the country has been using the resources it offers in order to strengthen its economy.
Another reason has been that Brazil thought that it is unfair that the most powerful economies in the world, like the United States for example, have been systematically destroying their forests because of their economic interest, so they have the right to do so since it is in their own territory.