What is an environment variable as it relates to Windows?

A) A Task Manager setting
B) A name and a value that relates to a program or Windows
C) A tile that links to a favorite file, folder, or application
D) An icon on the desktop that has an arrow as part of the icon and links to a specific application

An environment variable is a dynamic value that can affect how a program or Windows itself operates. It consists of a name and a value, and can be used by software developers or system administrators to adjust program behavior or system settings. Examples of environment variables in Windows include PATH, which specifies the directories in which programs should search for executable files, and TEMP, which specifies the folder where temporary files should be stored. Environment variables can be viewed and modified using the System Properties dialog in Windows.