Answer and Explanation:
This question is about "To build a fire."
What motivates a man to travel is the feeling that he will be able to reach the camp after a few hours of walking. In the accommodation he will have food and warmth to protect himself from the intense climate that he is subjected to. The hope of arriving at the camp makes the man have the courage to walk many kilometers, in the extreme cold, as the temperature was -75ºF.
Man's motivations change during the journey because he needs to do things that will allow him to survive.
Intrinsic motivation is a motivation "from inside", with internal, rather than external awards.
Three of the things you mentioned have an external reward: the 500 Dollar prize( first option), the credit (third) and the hope of winning a blue ribbon (the last).
Only the second one has an intrinsic motivation: that you will be happy about performing this song (feeling proud of yourself, etc).
Spend 20 mins on each and take a break
