The definition of line refer is the definition of a reference line. In other words an arbitrary fixed line (as an x-axis or a polar axis) from which coordinates of/from a point are computed or generated
D. All of the above √√√√√√√√√√√
Answer: A memoir is a group of past memories from that person. Though an autobiography is the actual story of that person's life. A biography is a look at someone else's life/story.