The distribution of income received in the form of rent, wages, or interest is the main factor that determines

Who consumes goods and services

Explanation:

The goods that produced in a country usually differ in terms of Price and Quality. Producers specifically created the difference in order to target different types of consumers.

Typically, people who have higher income/wages tend to consume the products that have higher price/quality. Meanwhile,  the people who have lower income/wages tend to consumes the products just to fulfill their basic needs.