Final answer:
The physical structure and storage organization of a database is decided upon during the implementation phase of the systems development life cycle.
Step-by-step explanation:
The statement is True. The physical structure and storage organization of a database are decided upon during the implementation phase of the systems development life cycle. In this phase, the database design is translated into an actual physical database that can be used to store and retrieve data efficiently.
During implementation, decisions are made about the hardware and software that will be used to support the database, as well as the organization of data files, indexes, and other structures. These decisions are crucial for the overall performance and efficiency of the database system.