Respuesta :
The correct answer is B). "Spring Tides" is working as the subhead in this excerpt.
A subhead is the title or heading given to a subsection of a piece of writing such as a newspaper article. The information presented in this subsection is closely related to what the main section is discussing; however, a subhead is generally shorter and also smaller in size than the main headline. Furthermore, a subhead is used to attract the readers' attention and give them a glimpse into the kind of information they will find in that subsection.