Which design principle should the company use to meet this requirement?

Explanations:

Disposable resources refer to the practice of using short-lived resources that can be replaced easily. While this can aid in scaling and resource management, it does not inherently provide availability or fault tolerance for application components.

Automation focuses on automating processes to increase efficiency and reduce human error. While automation is beneficial for deployment and management, it does not directly address the availability of application components in case of failure.

Rightsizing involves optimizing resource allocation based on actual usage. This principle aims to enhance cost efficiency rather than ensuring high availability or resilience in case of component failures.

Loose coupling is a design principle that promotes the separation of components in an application, allowing them to operate independently. This design enhances fault tolerance, as the failure of one component does not impact the others, thus maintaining overall application availability.