Answer:
Personal experiences and memory of the author.
Step-by-step explanation:
Prewriting is the germinal phase of the writing process. It includes five basic strategies which are also called "brainstorming strategies" which include listing, clustering, freewriting, looping and asking the journalists which may be based on several topics like illustrations, statistics, literature, etc. But prewriting strategies for autobiographical writing is often associated with the author's personal experiences and memory. It helps him/her exemplify their perceptions or viewpoint to the readers. An autobiographical prewriting focuses on the gathering and arranging the information of the major events and happenings of the author's life and its consequences to present it to the readers in a more relative and effective manner.