Which of the following best describes Delta Retrieval?

Delta Retrieval specifically refers to a method of extracting data that focuses solely on the changes or differences that have occurred since the last retrieval operation. This means it effectively minimizes the amount of data that needs to be processed and transmitted, as it only pulls the most recent updates or modifications rather than the entire dataset.

This method is particularly beneficial for systems where data is frequently updated, as it optimizes both performance and bandwidth usage. By concentrating on the changes, Delta Retrieval allows for quicker updates and more efficient data management, thereby enhancing the responsiveness and efficiency of systems that rely on continuous data flow.

In contrast, the other choices imply broader or different approaches to data retrieval that do not align with the specific focus of Delta Retrieval on only changes made to data points.