Facial expressions can help bring a speech to life when used by a speaker to communicate emotions and demonstrate enthusiasm for the speech.
I believe it is true that facial expressions can bring a speech back to life. I say this because personally I tend to be bored when people present speeches and just keep a blank face for the whole speech which kills the speech. I think speeches should be interesting and alive by making appropriate facial expressions that match the tone. In conclusion facial expressions are needed in order to show how interested the speech giver is and how to keep it alive.