In the middle of a biography, you can describe one character or several characters. The so-called thoughts and actions refer to important and relevant words. For example, reading a book every day causes some feelings, which is of course thought. Doing things every day, dealing with piles and piles, of course, is action. However, this kind of thought and action is too trivial, which has little to do with the life of the character and is endless, so it is often not described in biographies.
A person who writes a biography must grasp the thoughts and behaviors that can express his character or have great influence on society and write his biography. Because of this, although biography is not a diary recorded by the day, it can also let readers know the life of the characters and cause the feeling of "meeting people".