"Time to get ready for Uncle Mike's birthday party, Jimbo" Mom said. "But Mom, I need to work on my science fair project," Jim looked up from a table filled with wires, glue, and pleces of wood.
"Jim, you've known that it's Uncle Mike's birthday celebration for over a month. It was you who helped plan it!" The wrinkle between his
mother's eyes deepened.
"I know, but my science fair project is due tomorrow!" Jim said.
"Oh Jimbo," his mother sighed, "why do you always wait until the eleventh hour?"
Which does the phrase "the eleventh hour" mean in the passage?

the purpose of the heading in the passage is to identify who is telling the story.

this excerpt is part of the book sugar changed the world (2010) written by marc aronson and marina budhos. as the book has been written by two people, the heading "marc" indicates that this specific excerpt is being narrated by aronson. in the fragment, marc describes his grandfather's story after hearing it from his cousin. however, there are other excerpts where budhos is the one that tells the story of her family.

aronson and budhos, who are husband and wife in real life, decided to write sugar changed the world when they found out how sugar, which had an important role in slavery and economy, changed their ancestors' lives.

i have 15 more questions to answer and i’m a english person