They define the operations and behaviors the application must perform is correct because system requirements specify what the software must do and how it should behave in order to meet stakeholder needs.

They define the operations and behaviors the application must perform are the primary project artifacts at the start of work because they capture functional requirements, use cases, and acceptance criteria that drive design, development, and testing. Requirements provide the basis for scope, traceability, and validation so teams can ensure the delivered product meets stakeholder expectations.

Cloud Security Command Center is incorrect because it is a specific cloud security product and service rather than a project artifact that defines software functionality. It is a tool for monitoring and managing security in a cloud environment and not a requirements document.

They describe the adversarial and operational environment that could affect the application is incorrect as the primary choice because environmental context and threat information are important inputs but they are not the same as the system requirements that define the application behavior. Those contexts inform requirements and threat models but do not replace the functional and behavioral specifications.

They prescribe the implementation techniques and development steps to be used is incorrect because good system requirements avoid mandating specific implementation details. Prescribing implementation and development processes belongs to design and project planning rather than to the requirements that state what the system must accomplish.

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