I want to know the answer to the following question:
Why would they leave agricultural lifestyle?
All the background I'm provided with is that "In the Brazilian rainforest, those groups that recently did, or even continue to, rely on hunting and gathering techniques seem to have adopted this lifestyle, abandoning most agriculture, as a way to escape colonial control and as a result of the introduction of European diseases reducing their populations to levels where agriculture became difficult.[citation needed][dubious – discuss]". Is that enough to answer the question?
Answer: yes