Which of the following is a primary source of information?
A. A speech that refers to an event
B. A photograph taken at an event
C. A textbook description of an event
D. A newspaper article about an event
A primary source of information is an original, firsthand source that provides direct evidence about an event or topic.
Photographs taken at an event capture a direct visual record of that event, making them a primary source of information. The other options may refer to or describe an event but are not the original sources themselves.
Therefore, the Correct Answer is B.