What is the part of speech of "this" in "The bell rang too loudly for this small room."?

In the sentence "The bell rang too loudly for this small room," the word "this" functions as a demonstrative adjective. It is used to modify the noun "room," specifying which small room is being referred to. Demonstrative adjectives provide a sense of proximity, helping to indicate whether something is near or far in relation to the speaker.

In this case, "this" directly describes "room," indicating a particular small room that is likely in the immediate vicinity of the speaker. Recognizing "this" as an adjective is crucial because it illustrates how words can serve different functions based on their role in a sentence.