Final answer:
Helen Keller's first-person narrative in the excerpt allows readers to learn her thoughts and feelings during her pivotal moment of discovering the concept of language.
Step-by-step explanation:
The excerpt from The Story of My Life by Helen Keller gives us a first-person perspective that significantly enhances our understanding of her experiences. This point of view allows readers to learn what Helen is thinking and feeling when she discovers language, which is the correct answer among the given options (C). When Helen feels the water and simultaneously has the word spelled into her hand, she experiences a powerful realization. She describes a 'misty consciousness' and a 'thrill of returning thought', suggesting that language and understanding are dawning on her. The use of vivid language and sensory detail brings readers into Helen's world, illustrating how the moment of learning the word 'water' brought light, hope, and joy into her life, igniting her soul and offering her a sense of freedom.