What is the background?

Background: Literally speaking, corresponding to the prospect, it is the "soil" on which people's conscious objects depend, that is, the meaning of the background. There are several explanations: 1. A set on a stage or in a movie. Put it in the back to set off the foreground. 2. Set off the scenery of the main things in pictures and photography. 3. The historical situation or realistic environment that works for people and things. For example: historical background; Political background. Background is a part of an image or a scene, which sets off the main things (foreground) and plays an important role in the occurrence, development and change of the scene. The main function of the background is to render the maximum effect and function of the subject and play an auxiliary role.