Answer:
difference threshold
Explanation:
A sommelier, or wine steward, is a prepared and learned wine proficient, regularly working in fine eateries, who has practical experience in all parts of wine administration just as wine and food matching. The part in high end food today is considerably more particular and educated than that of a wine server.
Lucas is a sommelier, or a wine taster, whose task is to taste the slightest flavor differences between two wines. This is an example of difference threshold.
