Which of the following best defines a "source"?

The definition of "source" as "a place or thing from which something can be obtained" accurately encapsulates the concept of what a source is in various contexts. In research, a source can refer to books, articles, people, or any material that provides information. It indicates the origin where information or resources come from, highlighting the role of sources in gathering data or knowledge. This understanding is crucial for critical reading and research, as it enables individuals to evaluate the credibility and reliability of the information they are using.

The other choices do not encapsulate the broader and essential concept of a source. While a person who elaborates on ideas might be considered a source in certain discussions, it does not reflect the comprehensive and versatile nature of sources. A fictional character does not serve as a source of factual information, and a report without evidence fails to qualify as a credible source because it lacks the necessary backing that defines reliable sources in academic and research contexts.