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Answer:
Noun- Thomas, Students, mouth
Pronouns- His, Him
Explanation:
A noun is the name of a person, animal, place or thing.
A pronoun is word that can take the place of a noun in a sentence.
From the sentence:
Thomas would not stop talking with his mouth full, so the students got mad at him.
The nouns and pronouns are;
Noun - Thomas, Students, mouth
Pronoun - His, Him
Thomas is a noun because it is the name of a person.
Mouth is noun because it is the name of an organ in the body.
Students is a common noun because it names a particular group of people.
His and Him are both pronouns because they were used in the sentence to replace the noun, Thomas.
The answer is 1, because paying attention to word choice is a solution to a communication barrier