What does not contribute to the effectiveness of the delivery of a speech

Effective communication is based on trust, and if we don’t trust the speaker, we’re not going to listen to their words. Also there are several elements which contribute to the effectiveness of the delivery of a speech: gentle eye contact, kind facial expression, warm tone of voice, expressive hand and body gesture, relaxed disposition, slow speech rate, b revity. I think that religion does not contribute to the effectiveness of the delivery of a speech.