If someone claims that a diary is biased, what does that mean?

What crucial event can change a protagonist's life

Read the paragraph. we heard music coming from the auditorium so we crept up to the door in peaked in. i couldn’t believe my eyes! a group of dancers were on stage in the most beautiful costumes i have ever seen. i looked at mabel and she looked back at me with the same expression. our eyes were wide with joy and wonder. which point of view does the narrator use

This passage from chapter 4 of story of my life is an example of which story of plot