Final answer:
The Sustain phase of the privacy operational life cycle is about continuously managing and maintaining privacy controls to protect personal information from threats like identity theft, adjusting to changes in the risk environment.
Step-by-step explanation:
The Sustain phase of the privacy operational life cycle involves ongoing management and maintenance to ensure that privacy controls continue to be appropriately implemented and to adapt to changes in the risk environment. It includes monitoring of privacy practices, regular assessment of privacy controls, and modification of privacy policies and procedures as necessary to respond to changes in technology, business operations, or legal requirements. Given the recent large-scale data breaches, including those affecting Target, JP Morgan, Healthcare.gov, and Verizon, it is clear that privacy management is critical in protecting personal information from threats such as identity theft.