Final answer:
The sense used to identify flavors without a blindfold is smell, which is one of the five human senses that are highly interconnected with taste.
Step-by-step explanation:
When identifying flavors without the use of a blindfold, the sense that was used is most likely smell. The five human senses consist of hearing, sight, taste, touch, and smell. Among these senses, taste and smell are the most interconnected; both are chemical senses that involve molecules from the environment bonding to receptors in the body. The sense of smell allows us to sense food and other important factors in our surroundings, which, in combination with taste, helps us identify flavors. The ability to smell can markedly influence our perception of the taste of food.