Which of the following terms applies to evidence that supports existing theories derived from an original piece of evidence?

The term that best fits the description of evidence that supports existing theories derived from an original piece of evidence is corroborative. Corroborative evidence refers to additional information or data that strengthens and confirms the initial findings, adding credibility to the existing theories. This type of evidence helps establish a clearer understanding of a situation by providing further validation.

In contrast, probabilistic evidence deals with likelihood or probability rather than direct support. Accurate evidence simply refers to information that is correct or precise but does not necessarily provide supportive value to existing theories. Indirect evidence, on the other hand, may suggest a conclusion but does not directly support it, and it often requires further analysis to link back to the original theory conclusively. Thus, corroborative evidence is essential in the field of cyber operations and investigations to reinforce and validate hypotheses or claims with additional supporting data.