If you are being asked this question in an interview, it's likely that the interviewer is interested in hearing about your experience with lighting and shading techniques in animation. Here are a few tips on how to answer this question effectively:
One example of how I have used lighting and shading techniques to enhance my animations was in a short film I created last year. In this film, there was a scene where the main character was walking through a dark alleyway. To create a sense of tension and suspense, I used a technique called rim lighting to highlight the edges of the character's silhouette. I also used ambient occlusion to create deep shadows and add depth to the scene. These techniques helped to enhance the mood of the scene and make the character look more three-dimensional. Overall, my use of lighting and shading techniques in this scene helped to create a more immersive and engaging animation for the audience.