Respuesta :
The purpose of informational text is to inform the audience. While this excerpt is about tides, the central idea or main focus is the Neap Tides. The question of "What causes tides?" is a lead in question to get the readers interested in the article; therefore, B is not a good answer, nor is D since it does not tell you anything about what you are going to read (as a title should do that). Having a full sentence as a title is not good writing either, so A is the best answer.
Answer:B. What causes tides?
Explanation: a heading is typically at the beginning of an article or writing, similar to a title and caption. Usually at the beginning of a passage. hope this helps!