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.
Examples is the correct answer because the sentence says that they "can be both real and hypothetical". In the answer choices examples best fits because these can be real or hypothetical. Testimonies are always someone's truth. Statistics are also real. Narrations are real as well since they tell a story about someone.
