One of the most powerful weapons that you can have in your arsenal while you are delivering a speech ​

Are your words, your facial expressions, and your tone of voice.

Whenever you are delivering a speech people will look at how you express your feelings whilst giving it. Some may judge how your feeling whilst others compare it to your words. Your facial expressions give away if you are feeling bored when talking about the topic, or if you feel emotional and devote your heart and soul when talking about it.

Your words also influence your speech. The way you phrase your words always have a meaning to most, which may 'either touch their hearts or make it below sea level'.

Your tone of voice influences your speech as well. If you talk loudly and passionately people would know that you are putting your mind and body to work, showing them that it is your true passion. Whilst other times if you talk in a mono tone then people would think that you don't want to be there and they themselves wouldn't want to either.

Hope this helped.

These are all the things you have in your arsenal when delivering a speech, although only you can choose to use them.