I think where Brazilians mainly live is in the Southeast of the country by Argentina. In this area there is plains for farming, and it looks to be heavily populated. Whereas most of the country is the amazon rainforest, where few people live.
America has near unbelievable amounts of arable land. And America is organized differently than other nations. In most nations 95%+ of the land is owned by either the aristocracy in the form of farms, and the rest is public lands, where there is not private ownership. Corporations like logging companies lease land from the state, but they can't really be settled without people being able to buy land and decide what to do with it. The UK is an example of this, 50% of the UK land area is farms, 47% of the area is Crown land like forests and 3% of the area is the towns & cities. In most countries you can't just buy farmland and then convert it to suburbs or condos or shopping malls. They have strict zoning laws which require the land to stay as farming. And only a tiny trickle of land each year is given zoning permission to change, which creates artificial shortages for land for like housing. Which drives up the price of housing, and creates a transfer of wealth from the main bulk of people to the aristocracy. For example if a large land owning family is granted permission to develop a strip mall in most other countries, they can rest assured no other permission for a mall will be granted any time soon and thus charge monopolist rents.
In the UK there is 40,000 families which own that 47% of the land area(which is over 90% of the area where private ownership is allowed). But in America, especially in the Eastern States, like >90% of the land is privately owned. And instead of just a relative few families owning the land, there is millions of land owners. Yet another difference is in the USA, planning permission is granted mainly by counties. Whereas in other countries regional or even the national government are involved in restricting development. Many counties in America do restrict development for various reasons, but Americans have simply migrated to other counties where there is more open opportunities. And this continues to this day, as Americans move to States like Texas and Florida where the land is cheap.
The net effect of this gives America tremendous advantage. A country where wages are high, yet land and the cost of living cheap(compared to other countries).
I don't know about in Brazil specifically, but I do know in the Spanish Latin America, land ownership is even more heavily concentrated than in the UK. With these families having been given massive land grants centuries ago.