I would probably say that the author used diction to achieve some kind of effect in the first sentence.
A. The teacher stood at the door smiling brightly and welcoming each student to her classroom on the first day of school.
The author's diction, or word choice, in this sentence portrays the teacher as a nice, kind, caring person.
Answer:
The main idea is about the narrartor's experience on their first day of a new school
hope this helped :)
It is a "inferential statistic." Inferential statistics seek to determine what a population might think or believe.
A ruler? I think that’s the answer