Comprehensive and Detailed Explanation From Exact Extract:
The Iterative software development model fits this description. It involves specifying and implementing a portion of the software, reviewing it, gathering feedback, and refining or adding requirements in successive cycles. This approach supports evolving requirements and continuous improvement. Iterative models contrast with Waterfall (C), which is linear and sequential, with no repetition of phases. "Code and fix" (D) is an informal, ad hoc process lacking formal review cycles. Implementation (B) is a phase, not a model. The iterative approach is advocated in ISO/IEC 12207 and NIST guidelines for secure development, as it allows early detection and remediation of security issues by incremental design and testing.
References:
ISO/IEC 12207 Software Lifecycle Processes
NIST SP 800-64 Revision 2: Security Considerations in SDLC
Microsoft SDL Documentation