The correct answer is - D. farming.
The southern and southeastern parts of Brazil are dominated by grasslands, the climate is tropical, there's seasonal rains, and the soil is very fertile.
Because of all the advantages that these two parts of the country have from farming perspective, it is heavily used for farming, both plants and animals.
They are the most extensively used parts of the country for food production, and also it is there where most of the cattle is located and raised.
