How does the underlined sentence on page 2 impact the plot?
It explains why Isabella asks Efie to work with
her
Isabella had invited Efie to work together
on their algebra assignment, which
focused on analyzing symmetry and
patterns, and now she grinned
affectionately. "I realized you didn't know
a single person in algebra, and I wanted
to make sure you felt at home."
This was true, as Efie's family had only
recently moved to town.
"So, what's our plan?" Efie asked.
"We're supposed to create examples of
symmetrical patterns," Isabella replied.
examining her notebook.
It explains how the girls get the idea to use
Kente cloth
It explains why the girls have difficulty with
the assignment
It explains how Efie came to have scraps of
Kente cloth at her house.
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You didn't tell us which one is underlined, but I would try to point out how one event, action, attitude, or behavior would impact other things that would later happen in the story. So, if the underlined sentence is something that has to happen for something else to happen later, that would be significant.

Explanation:

If you tell us which one is underlined I can try to give you a more detailed answer.

what is a theme?

ans: the implicit idea of a written work of literature is called a theme.

so, the only theme of "birdfoot's grampa" by joseph bruchuc is that as a human being one should always remember the value of every life on earth.

the grampa is stopping the car again and again to save those little toads from washing away in the heavy rain is an act of kindness and humanity.

the eye wink at the hand; yet let that be / which the eye fears, when it is done, to see.