Final answer:
The statement about the discovery of zero being a great cultural accomplishment is a summary, as it encapsulates the main idea without quoting or rephrasing specific details of a source.
Step-by-step explanation:
The note where the author says that the discovery of zero is a great cultural accomplishment can be identified as a summary. A summary is a brief statement that encapsulates the main ideas of the source material, usually in your own words, without providing specific details or examples. In this scenario, the statement generalizes the significance of the discovery of zero without offering a detailed explanation or the exact wording from a specific text, which is indicative of a summary rather than a direct quotation or a critical paraphrase.