Which pillar of the AWS Well-Architected Framework does this plan support?

Explanations:

While security is a critical aspect of the AWS Well-Architected Framework, the focus on defining infrastructure as code primarily supports operational excellence by minimizing human error and ensuring consistent responses.

The plan aligns with operational excellence, which emphasizes the ability to run and monitor systems effectively, improve processes, and respond efficiently to events. Infrastructure as code enables automated, repeatable processes that reduce human error.

Cost optimization is concerned with controlling costs while delivering value. Although infrastructure as code can indirectly contribute to cost efficiency by automating resource management, the primary focus of the plan is on minimizing human error and improving operational processes.

Reliability focuses on ensuring a workload performs its intended function correctly and consistently. While infrastructure as code can enhance reliability, the main aim of automating infrastructure management is better aligned with operational excellence.