That experience will linger on my mind for a long time”.

Meaning of linger is to stay or drift closely to you. The sentence that experience will linger on my mind for a long time” means that whatever u saw or was thinking about will be in your head for a long time or u will remember it for a while.

Explanation:

compare & contrast informative essay/speech

when speaking or writing for the sole purpose of providing information in order to give audience members a good basis for making a decision, you would present an informative speech or essay.   because you wouldn’t want to be persuading the audience by arguing for one type of exercise over the other, you wouldn’t choose a persuasive/argumentative technique.   to fairly, and without bias, present information about the pros and cons of each type exercise, a compare/contrast, informative speech/essay would be the best bet.