Final answer:
Smiling is an effective way for the speaker to build a rapport with an audience. It creates a positive and welcoming atmosphere, making the audience feel more connected and receptive to the speaker's message.
Step-by-step explanation:
Smiling is an effective way for the speaker to build a rapport with an audience. When a speaker smiles, it helps to create a positive and welcoming atmosphere for the audience. This can make the audience feel more connected to the speaker and more receptive to their message. For example, a speaker who smiles while delivering a speech may appear more confident and approachable, which can help to establish trust with the audience.