When we are forced to make choices we are facing the concept of
1. exploitation
2. efficiency
3. scarcity
4. the margin
You will find tha correct answer by reading
http://tutor2u.net/economics/revision-notes/as-markets-scarcity-and-choice.html
When we are forced to make choices, we are dealing with the concept of scarcity. Scarcity refers to the limited availability of resources in comparison to the unlimited wants and needs of individuals or society as a whole. This concept highlights the fact that we have to make choices because resources are scarce and we must allocate them efficiently to satisfy our various needs and wants.
To arrive at this answer, we can eliminate options that do not align with the concept of scarcity.
1. Exploitation: Exploitation refers to taking advantage of someone or something, often for personal gain. While this concept can potentially be applicable in certain situations, it is not directly related to the idea of scarcity and the need to make choices.
2. Efficiency: Efficiency refers to the optimal utilization of resources to achieve a specific goal. While making choices can lead to efficient resource allocation, efficiency itself is not the core concept being addressed when we are forced to make choices.
4. The margin: The concept of the margin refers to analyzing decisions and choices at the margin or on the margin. This concept helps evaluate the additional benefits or costs associated with the next unit of a resource or activity. While the concept of the margin can be related to decision-making, it is not directly linked to the concept of scarcity.
By process of elimination, we find that the correct answer is option 3. Scarcity.