Okay so i'm reading this story and there's this part in a question i don't get.

i'm going to try to make the question simpler so it doesn't require reading [hopefully]

in "eleven," rachel says that when you're eleven, you're also ten, nine, eight, seven, six, five, four, three, two, and one. what does rachel mean by this and why do you think the author chose these words to convey this meaning?

i got the part on what it means, but i'm confused why would the author choose the words you see up there about being the age under eleven to convey the meaning. [you don't need the story for this]