By encouraging development of the brazilian highlands, the government of brazil was attempting to solve the problem of

The government of Brazil is trying to reduce the overcrowding of coastal cities and is therefore investing in the development of the plateau.

Explanation:

Coastal cities in Brazil tend to have greater development and infrastructure, which ends up attracting the attention of several citizens who migrate to these cities in search of better quality of life. As a result, these cities began to show a super-population that contributes to the increase in poverty, unemployment and environmental impact. To reduce these problems, it is the Brazilian government that has invested in public policies for the cities of the plateau, so that people can migrate to these regions and balance the number of citizens.