Final Answer:
The given statement, "Mary can buy a set of TV using her monthly salary," exemplifies an economic choice, illustrating how an individual allocates their limited financial resources to fulfill a specific want or need.
Step-by-step explanation:
This statement reflects the concept of economic choice, which involves decision-making within the constraints of limited resources. In this case, Mary must decide how to allocate her monthly salary, a finite resource, to meet her desire for a TV set. Economic choices are inherent in everyday life, and individuals must prioritize their preferences due to scarcity. Mary's decision-making process involves weighing the opportunity cost — what she forgoes by choosing the TV set over other potential uses of her salary. This example underscores the fundamental economic principle of resource allocation and opportunity cost in decision-making.