Final answer:
The word 'Ouch' in the sentence is an interjection expressing pain or surprise.
Explanation:
Interjection is the part of speech underlined in the sentence 'Ouch! I have a splinter in my finger.' Interjections are words used to express emotions or sentiments.
In this case, 'Ouch' is expressing pain or surprise, making it an interjection in the sentence.
Understanding parts of speech, such as interjections, helps in analyzing and interpreting the structure of sentences.
Learn more about Identifying parts of speech in a sentence here:
https://brainly.com/question/36923252
