Explanation

An Amazon Machine Image (AMI) is a template that contains a software configuration (operating system, application server, and applications) and security requirements needed to launch an Amazon EC2 instance.

Key characteristics of AMIs:

• Prepackaged templates containing operating systems, applications, and configurations
• Deployable - can be used to launch multiple EC2 instances with identical configurations
• Security requirements - can include security settings and permissions
• Template-based - serves as a blueprint for EC2 instances

Why other options are incorrect:

• Amazon EBS volume: A block storage device for EC2 instances, not a deployable template
• AWS CloudFormation template: Infrastructure as code template for deploying AWS resources, not specifically an EC2 instance template
• Amazon EBS snapshot: A backup of an EBS volume, not a deployable instance template

The AMI provides the foundational template that allows you to launch EC2 instances with consistent, preconfigured environments.