Answer:
The correct answer is the first option: Because of our limited incomes conflicting with our insatiable wants for goods and services.
Step-by-step explanation:
To begin with, in the microeconomics theory, the individuals agents that are the consumers are all the time trying to satisfy their needs due to the fact that there is an unlimited desire for goods and services that keep continue to grow all the time and that conflicts with the fact that most of the people have only few and limited resources to get the necessary income to obtain all of those goods and services. That is why that the consumers always look for the way to maximize their satisfaction according to the available income that they have with the purpose to spend it on those goods and services.