Which pillar of the AWS Well-Architected Framework includes the AWS shared responsibility model?

Explanations:

The Operational Excellence pillar focuses on operations processes, monitoring, and optimization, but does not specifically address the shared responsibility model.

The Performance Efficiency pillar is concerned with the efficient use of resources to meet requirements, but it does not cover the shared responsibility model.

The Reliability pillar emphasizes the ability of a system to recover from failures and continue functioning, but it is not directly related to the shared responsibility model.

The Security pillar includes the AWS shared responsibility model, which outlines the security responsibilities of AWS and its customers, ensuring clarity on data protection and compliance.