How does it help you when you cite sources

Citing or documenting the sources used in your research serves three purposes: It gives proper credit to the authors of the words or ideas that you incorporated into your paper. It allows those who are reading your work to locate your sources, in order to learn more about the ideas that you include in your paper.

"the day we found the sharks' teeth" i would say highlight the element of the plot as it sets its boundaries and centers the adventures of them being on a boat and cleaning spit of sand.