The correct answers are "using a quotation", "giving an anecdote", "presenting a series of interesting facts", and "asking a thought-provoking question". When a text or a speech is being prepared it is important to include techniques to engage the reader into the information that is being given. Useful techniques include using a quotation to give emphasizes in a theme, give an anecdote to make the presentation personal, present interesting facts of ask a provoking question to make the audience think about the subject being presented.
