Jimmy noticed that nearly half the birds in the yard were brown cardinals while the others were vivid red cardinals, leading him to see them as two separate groups. Which Gestalt principle does this example best demonstrate?

Explanation

This scenario exemplifies the principle of similarity, where objects that share common features, such as color, are perceived as belonging together. Proximity refers to objects being grouped based on closeness, relative clarity involves distinguishing figures from backgrounds, and connectedness relates to objects linked physically or visually.