Why should data that is accessed together be stored together?

Storing data that is accessed together in close proximity optimizes the efficiency of data retrieval and can significantly reduce the time and resource costs associated with database operations. When related data resides in the same physical area on disk or within the same collection, it minimizes the need for multiple read operations across various locations, which can introduce latency.

This organization allows for faster query execution as the database engine can retrieve the required data in fewer I/O operations. In environments where performance and speed are critical, such as applications requiring real-time data processing or analytics, this approach proves highly beneficial. Overall, effective data placement leads to improved performance and can also lower operational costs, making it a foundational principle in database design.

Other options involve aspects that may not be directly linked to the rationale for data organization, such as redundancy or backup procedures, which don't primarily focus on the efficiency of access times or resource management.