Why do some readers like biographies?
a. they express real events as if they are stories
b. they require the reader to know other things
c. they include fun puzzles for the reader to solve
d. they express fictional events as if they are real

The answer is A: They express real events as if they are stories.

A biography is a form of narrative that recounts the events and stories that make up a real-life person´s history. Even though it is not fiction, it is a narrative account of that person´s life, which means that there can be, like in works of fiction, a setting, a plot, and a conclusion or resolution, which are elements both of entertainment and edification, which, in turn, can be very appealing to certain readers my mixing reality with story-telling.  

technical documents should be clear and precise. basically, clarity is the key element in a successful technical document.