Answer:<u> Option D
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Solar panels contain a very expensive element, i.e. silicon. This element is able to convert the solar energy into electric energy. The cost of the solar panel gets expensive because of this rare element. It is found in limited areas of the world. That’s why option D is correct. Coal is not used in solar panel, so option B is incorrect. Neither is wind energy, so option A is also incorrect. Water is also not used for exploiting solar energy, which makes option C a wrong answer.
Hi how are you doing today Jasmine
<span>D) tightly packed electrons</span>
The answer is exemplar model of organizing concepts. It is because the exemplar model was able to make Juan and Sergei correct because this model enables their examples to be appropriate or compatible to the questions being asked. It is a way of saying that the examples that they have been given is the a good example to the question that has been asked, making it correct and reliable.