Melly just moved into her first apartment. She is excited to decorate the apartment and make it her own. Her first step is choosing paint colors for the walls. She has a hard time choosing between two different shades of blue, but her friend was able to point out that one was darker and therefore better for a bedroom. In the kitchen, she chose a lemon-yellow paint. Melly had little money for furnishings and ended up with a lumpy chair from her mother and a sofa that was covered in slightly itchy fabric. On her first evening in the apartment, she lit a vanilla-scented candle that reminded her of home. Based on the scenario described, how is Melly using each of the following concepts to help her settle into her new apartment? Olfactory bulb
Sensory adaptation
Difference threshold
Brightness