Which psychological principle explains why the Amazon logo has an arrow pointing from A to Z with a smile?

Brand logos are powerful psychological tools that communicate much more than just a company's name. The most successful logos trigger specific emotional responses and create instant brand recognition. Colors, shapes, and design elements are carefully selected to influence consumer perception and behavior. Test your knowledge about the psychological principles behind some of the world's most recognizable brand identities!

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The Gestalt principle of closure, suggesting completeness while implying they sell everything from A to Z with happy service
The Von Restorff effect, using the smile to create a distinctive memory hook that differentiates from competitors
The Stroop effect, creating cognitive dissonance between the text and symbol to increase memorability
The endowment effect, suggesting ownership of products will bring happiness and completion