Answer :
Brazilian favelas began to expand rapidly in the 1970s due to Brazilian economic growth, with the increase in GDP, which caused greater industrialization and low inflation.
During this period, there was a rural exodus, where low-income people went to industrialized centers in search of jobs, and settled in precarious housing in places without infrastructure and regularization.
The slum process is therefore a social problem in Brazil caused by poor income distribution and unemployment.
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