Which of the following is a feature of Docker Compose?

Docker Compose is designed to simplify the management of multi-container Docker applications. One of its key features is the ability to define application services in a YAML file. This file, typically named docker-compose.yml, allows developers to specify the configuration for all services of an application, including networks, volumes, and service dependencies. By using a YAML file, developers can easily version control and share their application configurations, making it easier to manage and deploy applications consistently across different environments.

The other choices do not accurately represent Docker Compose's characteristics. For instance, it does not limit support to only Linux-based applications; Docker itself is platform-agnostic, allowing the deployment of containers across various operating systems. While there are settings in the YAML file that manage multiple services, a single docker-compose.yml is typically sufficient for defining all the required services, negating the need for separate configuration files. Lastly, Docker Compose is actively used in modern application development, facilitating the orchestration of containerized applications, hence it is far from outdated.