"the taunts are rude and need to stop! " cried mrs. norris.
what part of speech does the word in capital letters play in this sentence?

Mrs. is a honorific and Norris is a proper noun.

Explanation: Part of Speech or Word Classes are groups of words, each indicating a function and a meaning, depending on the use, within the sentence. There are 8 classes: noun, pronoun, verb, adjective, adverbs preposition, conjunction and interjections.

In this excerpt, the words in capital letters are nouns: the word Norris is a proper noun, which names a specific person.

The word Mrs. is also a noun but it is a honorific, which refers to a title in terms of respect.

what is the question.. you are more likely giving us something to read with no question

the rhyme scheme is abab cdcd efef gg.