A book usually written by someone else. it's usually about a famous person but someone who isn't well known writes about them. they conduct interviews and stuff but the the person it's about doesn't write anything about it.
ex. taylor swift
author: John brown
Changing a subscript can change the equation.
Answer:
facts
Explanation:
where yout wrote the facts or points of the topic you have choosen
Open gram merely it will surely help you
