Kubernetes has become a core platform for deploying and managing containerized applications, making security a critical part of modern DevSecOps practices. Securing a Kubernetes cluster involves multiple layers, including role-based access control (RBAC), network policies, image scanning, secrets management, runtime protection, and continuous monitoring. Since cyber threats and misconfigurations can lead to serious vulnerabilities, organizations must integrate security throughout the entire CI/CD pipeline and cluster lifecycle. In your opinion, which Kubernetes security practices are the most important for building a strong DevSecOps strategy, and what challenges do teams commonly face when implementing them effectively?