The correct choice is Agile.

Agile is the methodology that emphasizes short, iterative development cycles and frequent delivery of working software while keeping customers engaged for feedback and reprioritization. This approach uses regular reviews and collaboration so the team can adjust requirements and deliver incremental value, which matches Meridian Apps desire for frequent working software and ongoing customer involvement.

Lean is incorrect because it primarily focuses on waste reduction, flow efficiency, and continuous improvement rather than prescribing iterative customer collaboration and frequent releases as its core definition. Lean ideas can support fast learning but the question targets the methodology known for iterative delivery and direct customer involvement.

Waterfall is incorrect because it is a sequential, phase driven model that completes requirements and design before implementation, which makes frequent working releases and continuous customer collaboration difficult to achieve.

Predictive is incorrect because it refers to plan driven project management that sets scope and schedule up front and relies on following that plan. That approach does not prioritize iterative development or ongoing customer collaboration the way Agile does.

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