What might explain the contradiction that the Northeast has plenty of mining but is still the poorest region of Brazil in terms of its GDP per capita?

What important race leader of the early twentieth century is being described?

Which of the following  bestillustrates a negative reinforcer?               a.  copland gives up candy to stave off chronic acid indigestion.    b.  nancy learns that she prefers chocolate over vanilla.    c.  carmine changes his major to english lit after failing a math exam.    d.  on a hot day, lindberg always drinks lemonade.

Ashort story about human cruelty is adapted for dramatic radio broadcast. what choice might the broadcast's producer make to present the theme effectively? a. play suspenseful music when a character is acting cruelly o b. have an actor step out of character to deliver a moral to the audience o c. insult the audience throughout the broadcast o d. have the actors share memories of times when they were cruel