Which of the following is a package manager specifically designed for containers?

The correct choice is Helm because it is specifically designed to manage Kubernetes applications through the use of packaging. Helm serves as a package manager for Kubernetes, allowing users to define, install, and upgrade complex applications in a simple and repeatable way. It uses a packaging format called charts, which contain all the necessary information to deploy an application within a Kubernetes cluster, making it easier to manage containerized applications.

Helm streamlines application deployment by allowing developers to manage dependencies, configuration, and versioning directly, ensuring consistent and reproducible deployments. Its focus on Kubernetes distinguishes it from other tools that do not specifically cater to container management in the same way.

The other options mentioned serve different purposes. Terraform, for instance, is an infrastructure as code tool that is used for building, changing, and versioning infrastructure safely and efficiently, but it is not a package manager for containers. Ansible, on the other hand, is an automation tool primarily used for configuration management and orchestration, and while it can deploy containers, it is not specifically designed as a package manager for them. YAML, which stands for "YAML Ain't Markup Language," is a data serialization format often used for configurations but does not function as a package manager.