Among the options given on the question the correct answer is option D.
He is interested in new ideas and concepts.
Explanation: The excerpt shows about characteristics of the Kamkwamba. The excerpt frrom the book The Boy Who Harnessed the Wind by William Kamkwamba.
Kamkwamba is interested in new ideas and concepts. He was very excited when found about the Magnet in the book. He already he knew about some basic things about magnet. He played in the school with the Magnet field. But further he found about a specific kind of Magnet which is called as electromagnet. He didn't know about this kind of Magnet.
So he became interested about.This view proves that he is interested in new things.
