why does my boyf. riend NEVER tell me no? and is ALWAYS nice to me? his name is johnny and i asked him out 1st. :)

Which of the following best describes the difference between “autobiography” and “memoir”? a. autobiography is written about the author's own interpretation of events; memoir is a written interpretation of events. b. memoir covers a particular time in the writer’s life or recounts life events around one or two themes; autobiography covers the entire story of the author's life and has multiple themes. c. autobiography covers the entire story of the writer's life and has multiple themes; memoir is a shorter written work with one theme. d. autobiography covers entire story of the writer's life and has multiple themes; memoir is the writer’s random memories about past experiences.

The authors use the word “backbone” in lines 3 and 39 to indicate that

Why do you need to classify the size of a particle