Answer:
Demographic
Step-by-step explanation:
Demographic segmentation is when a business divides its market according to characteristics like race, age, gender, income, religion and level of education to have a better understanding of the customer's preferences and needs to be able to design strategies that reach the target market more effectively. According to this, the answer is that a firm that uses demographic segmentation divides a market into groups based on age, income, or level of education.