Final answer:
Teresa takes longer to make a gallon of root beer than Neha, requiring 7 hours compared to Neha's 3 hours.
Step-by-step explanation:
The question asks who takes longer to make a gallon of root beer between Neha and Teresa. Neha takes 3 hours to brew a gallon of root beer, while Teresa takes 7 hours to do the same task. Comparing the time taken by each, it's clear that Teresa takes longer to brew a gallon of root beer. Thus, the answer is Teresa.