I am confuse with the brackets?

  var questions = [
    { 
    question: 'How many states are in the United States?', 
    answer: 50
    },
    {
    question:'How many continents are there?', 
    answer: 7
    },
    {
    question: 'How many legs does an insect have?', 
    answer :6
    }
  ];
  var correctAnswers = 0;
  var question;
  var answer;
  var response;

  function print(message) {
    document.write(message);
  }

  for (var i = 0; i < questions.length; i += 1) {
    question = questions[i].question;
    answer = questions[i].answer;
    response = prompt(question);
    response = parseInt(response);
    if (response === answer) {
      correctAnswers += 1;
    } 
  }

  html = "You got " + correctAnswers + " question(s) right."
  print(html);

 question = questions[i].question;
    answer = questions[i].answer;