Which option represents a common feature of green screen technology?

• A. Blue screen
• B. Green screen
• C. Chroma key
• D. Background plate

Answer: (B)

A green screen is the feature that defines this filmmaking setup: it provides a uniform, distinct color backdrop that lets the camera and post-production software separate the subject from the background. By lighting and exposing carefully, that solid green becomes an easy-to-detect mask, so the software can remove it and replace it with a different image or video—this masking process is chroma keying. The green screen itself is the hallmark element you see in this technique, which is why it’s the best fit for describing a common feature of green screen workflows. While blue can be used for chroma keying in some cases, the option highlighted here focuses on the green screen backdrop itself as the defining feature.