Aspartame is an artificial sweetener,drawn below. Which of these functional groups is NOT contained in aspartame? 
Definitions:
Psychology
The scientific study of the mind and behavior, encompassing both conscious and unconscious phenomena.
Sensations
The physical feelings or perceptions resulting from something that happens to or comes into contact with the body.
Feelings
Subjective experiences of emotions, representing personal reactions to emotions that are influenced by personal experiences and interpretations.
Images
Mental representations or visual pictures in the mind.
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