choose from For example or therefore
1. Most listeners don't simply absord your message of thier own called feedback._______, when you phone a friend to say you'll be late, you may hear,"Hey, you really need to get here on time!" That is feedback. I am a bit confused. Thanks
For example ... use this when you have made a general statement and then follow it with a specific example.
Therefore ... use this when you are explaining further about a point you just made.
http://www.answers.com/therefore
http://www.answers.com/topic/for-example
Thnak you.
In the context of your sentence, the appropriate choice is "For example."
"For example" is used to provide an illustration or specific case that supports or demonstrates a statement. In this case, it is introducing an example of feedback. It explains that when you inform a friend that you'll be late, their response "Hey, you really need to get here on time!" can be considered feedback.
Therefore, "For example" is the correct choice in this sentence.