Answer: Tone of communication
Explanation: Voice tone is really about the feeling behind what you mean. There's no shift in your voice, but the way you speak to someone. If you're angry, you might be brusque; if you're pleased, you might be delighted with your expression.
In simple words, tone depicts the attitude of the employees while making a statement to their audience. It shows the maturity level of the dictator and shows how he or she handles the situation.
Hence from the above we can conclude that tone would be the most important element in the given case as the audience of that message can get emotionally affected from that information.