Which type of evidence involves seeing oil discharge from a boat?

Direct evidence is information that directly supports a fact or allegation without the need for further inference or assumption. In this case, seeing oil discharge from a boat constitutes direct evidence because it provides firsthand observation of an event—specifically, the act of oil being released into the water. This type of evidence is considered strong and straightforward, as it allows observers to draw a clear connection between the evidence and the conclusion of illegal discharging of oil into a marine environment.

On the other hand, circumstantial evidence would involve information that suggests a connection but requires additional reasoning to reach a conclusion. Conclusive match evidence is typically related to specific scientific comparisons, such as matching a substance found at the scene to a known source, while documentary evidence refers to written or recorded data that supports a claim but does not involve direct observation. Thus, the type of evidence involved in directly witnessing oil discharge aligns perfectly with the definition of direct evidence.