Final answer:
A scientific phenomenon is any event in the natural world that occurs under consistent circumstances and can be observed and studied. It is a regular part of nature and can be investigated through the scientific method.
Step-by-step explanation:
The best description for a phenomenon in the context of science is C. Any event in the natural world that occurs under the same or similar circumstances. A phenomenon refers to any observable event especially one that is seen in the natural environment, and it can be studied and potentially explained through scientific investigation. By using the scientific method, which often begins with making an observation, a scientist may conduct a controlled experiment, develop a hypothesis, and aim to explain the phenomenon. A phenomenon does not always have to be unusual or undefined; scientific phenomena can be regular events that are a part of nature's workings. When an event cannot be explained naturally and is attributed to supernatural causes, it is beyond the scope of scientific investigation.