In terms of the cloud, security is about architecting every workload to prevent unauthorized access or potential breaches. This involves implementing measures such as encryption, identity and access management, and compliance with security standards. Security is fundamental to ensuring that cloud operations are safe and secure from external and internal threats.

A VLAN (Virtual Local Area Network) is a feature often related to networking and is not typically categorized as a cloud component. The other options - Marketplace, Identity and Access Management, and Compute - are all fundamental components frequently associated with cloud services.

Performance Efficiency in cloud security involves the ability to use cloud resources efficiently and adapt to changing demands and evolving technologies. Design principles for Performance Efficiency include going global in minutes and using serverless architectures, as these strategies help in maximizing resource utilization and providing a scalable infrastructure efficiently.

Making small, reversible changes is a design principle associated with Operational Excellence. This pillar emphasizes the ability to support development and run workloads effectively, which includes practices like performing operations as code, refining operating procedures frequently, anticipating failures, and learning from failures. These principles contribute to a more agile and resilient operational environment.

Cloud Templates, often used in services like AWS CloudFormation, support defining resources in text formats such as JSON and YAML. These languages are utilized to declaratively specify the infrastructure and resources to be managed in cloud environments.