Which technique to distinguish an object from its surroundings?

Forced perspective.

Explanation: In forced perspective, there’s an object that sticks out so that you focus on that. Example: if the object in the picture was colored while the background was black and white, you’d pay attention to that one colored thing. or if the object is super bright while everything else is plain and dark.

this shot is an example of a movie still, or screenshot. movie stills are done by a photographer while the movie is being filmed with cameras. the stills are used for advertising in posters, websites, newspapers, and magazines.