Which of the following best defines a "firsthand account"?

A firsthand account refers to a narrative or description provided directly by someone who has personally experienced or observed an event. This type of account offers direct insights and personal perspectives, making it valuable for understanding experiences and events in a detailed and authentic manner. Since firsthand accounts come straight from the source, they typically contain emotions, thoughts, and observations that are unique to the individual who experienced the event.

In contrast, the other options do not capture the essence of a firsthand account. A secondhand report involves information that has been relayed through another person, which lacks the immediacy and authenticity associated with firsthand experiences. A fictional story is created from the imagination and may not be based on real events at all, thus not providing an authentic experience. Lastly, labeling a source as unreliable implies that it cannot be trusted, which contradicts the notion of a firsthand account being a direct and personal narrative. Therefore, the best definition aligns with the concept of personal observation.