Yael is writing an essay about the development of folk tales. Read the excerpt from her essay.

Every culture throughout time has had its own folk tales, which were first transmitted from person to person with the technology available at the time. Folk tales began as an oral tradition. With the invention of written language, folk tales were recorded by community scribes, until 1450, when the printing press was invented. The result was a wider distribution of folk tales, which were collected in books.

Based on the beginning of Yael’s essay, how does the structure support her central idea?