Brazilians will vote in a highly polarized presidential race on Sunday. Here’s what to know

Millions of Brazilians will vote Sunday in an election dominated by two rivals: incumbent President Luiz Inácio Lula da Silva and Sen. Flávio Bolsonaro, the son of ex-leader Jair Bolsonaro, who was convicted in a failed coup attempt after he lost to Lula four years ago. Twelve candidates are on the presidential ballot, but only Lula and Bolsonaro are thought to have a real chance of becoming Brazil’s next head of state. If no candidate receives more than 50% of the vote, the top two advance to a runoff Oct. 25. Lula, who at 80 is one of the world’s...