The milk has turned sour. The underlined word is :

Question

Accepted Answer

The underlined word in the sentence "The milk has turned sour" is "sour." Let's analyze why Option 3, "Adjective," is the correct answer and why the other options are incorrect.

1. **Explanation for Option 3 (Adjective):**
   - An adjective is a word that describes or modifies a noun by providing more information about its qualities or characteristics. In the given sentence, "sour" describes the state or quality of the noun "milk." It tells us what kind of milk it is, specifically that the milk has gone bad or has an unpleasant taste. Therefore, "sour" functions as an adjective because it provides more information about the noun "milk."

2. **Why Option 1 (Noun) is Incorrect:**
   - A noun is a word that represents a person, place, thing, or idea. In this sentence, "milk" is the noun because it is the thing being described. "Sour" is not a noun because it does not represent a person, place, thing, or idea; instead, it describes the quality of the noun "milk."

3. **Why Option 2 (Pronoun) is Incorrect:**
   - A pronoun is a word that takes the place of a noun to avoid repetition. Examples include "he," "she," "it," "they," etc. "Sour" is not a pronoun because it does not replace a noun; it describes the noun "milk."

4. **Why Option 4 (Adverb) is Incorrect:**
   - An adverb is a word that modifies a verb, an adjective, or another adverb, often indicating how, when, where, or to what extent something happens. In this sentence, "sour" does not modify a verb, adjective, or another adverb. Instead, it directly describes the noun "milk," which is the role of an adjective, not an adverb.

In conclusion, "sour" is correctly identified as an adjective because it describes the quality of the noun "milk," making Option 3 the correct answer.