If you share the perspective or experience of someone who is similar to the members of your audience but who does not have any advanced knowledge or specialized background with the topic, what kind of support material are you using?

This kind of support material is called lay testimony.

Explanation:

Support material is used in a speech in order to back up what the speaker is saying, and to be able to reach the audience with the information and message he wants to give. Lay testimony is a support material, in order to reach the audience, but it isn´t the best option.

Lay testimony has no proof of a strong background  information, it is more a personal experience than a real knwoledge of the topic. This is why it is not such a strog support material to use.

because he had a big bear belly

answer; primary source information;