Final answer:
A Container is an application that's isolated in a lightweight package and allows you to run a program from one computing environment to another.
Step-by-step explanation:
The correct answer is Container. A Container is an application that's isolated in a lightweight package and allows you to run a program from one computing environment to another. It provides a consistent and reliable environment for the program to run, regardless of the underlying infrastructure.
Unlike an Emulator or a Virtual Machine, a Container doesn't require a full operating system. It uses the host system's operating system and shares its resources efficiently, making it more lightweight and faster.
For example, Docker is a popular Container platform that enables developers to package their applications along with all the required dependencies into a single Container image, which can be deployed and run on any machine with Docker installed.