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).
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People have not yet accepted the idea of using the sun's energy to create electricity.
Answer: Option 2.
Explanation:
The energy of the sun is a way with which electricity can be produced for both commercial purposes and for the personal uses also to be used at home. This form of energy is a renewable form of energy and it does not lead to any pollution or damage to the environment.
But still it is not a very common form of energy to produce electricity among the people till now. The reason for this is the initial installments cost of the solar panel to produce solar electricity is high and the people are also not much aware about this form of energy.
