A popular NPR radio show encourages listeners to solve a puzzle each week. If they have the correct answer and send it in to the show and theirs is chosen, they win a prize. This is an example of a:________
Based on the information provided within the question it can be said that this is an example of a contest. This is a promotional event in which individuals compete in a sport or activity where only the best have a chance of winning. Which in this case the activity is a mental puzzle that must be solved. The winners can then be chosen to win the prize.
