Final answer:
Expert testimony is the type of evidence illustrated by using information from a credible source.
Step-by-step explanation:
The type of evidence illustrated by using information from a source that is considered to be credible is expert testimony. Expert testimony refers to the statements or opinions provided by someone who is knowledgeable and experienced in a specific field. When using expert testimony as evidence, it is important to consider the expertise and credibility of the person providing the testimony.