It's going to be setting. Although it was using past pretenses like "was" it isn't a backstory, it wasn't describing the characters or any event. It was only describing the room, the setting. Hope this helps :).
A important part in a form of the arts
“Students attending school with mandatory uniform policies experience less pressure than do students who must choose their wardrobes”. Right from that you can see that the authors position is that he/she doesn’t agree with the fact that students should have uniforms.
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I'd say the word that best describes the meaning of curmudgeonly would be yelled. A good synonym for curmudgeonly would be grouch or irritable.
Explanation: The word curmudgeonly means bad-tempered and negative, so I would assume that him yelling at the children is why the word curmudgeonly is used to describe him.
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3. Completing a difficult task
Explanation:
