Academic writing can be written with different styles and formats subject to the demand of topic. There are different types of academic writing like descriptive, analytical, persuasive and critical writing. As per the demand of the topic a person chooses the type of correct academic writing like if a student is assigned to describe people, places, reports then he prefers descriptive writing, if a student is assigned to compare analytical comparison of two or more things then he uses analytical pattern, if a student is assigned to logical essays then he opts persuasive writing and if a student is assigned to do to research or make thesis on very specific topic then student is required to use pattern of critical writing. Ask Sir Wahab