Explanation:

- The sentence in question discusses children and their limited playtime due to homework.

- The underlined word is "playtime."

- Let's analyze the options:

- Option 1: Verb - A verb is a word that describes an action or state. "Playtime" does not describe an action.

- Option 2: Adjective - An adjective describes a noun. "Playtime" is not describing another word here.

- Option 3: Pronoun - A pronoun is a word that takes the place of a noun. "Playtime" is a specific noun itself.

- Option 4: Noun - A noun is a person, place, thing, or idea. "Playtime" is a thing that children have.

- "Playtime" refers to the time allocated for playing, making it a noun.

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