Final answer:
Marx uses the terms 'abstraction' and 'concrete' to discuss exchange value and use value. Abstraction pertains to exchange value, while concrete refers to use value. So, the correct answer is option b.
Step-by-step explanation:
In Marx's writings, he uses the terms 'abstraction' and 'concrete' to discuss the concepts of exchange value and use value. Abstraction pertains exclusively to exchange value. Exchange value is the value of a commodity in terms of its ability to be traded for other commodities.
It is an abstract concept because it is not tied to the specific use or utility of the commodity. On the other hand, concrete refers to the specific use value of a commodity. Use value is the utility or usefulness that a commodity has for satisfying human needs or desires. It is the material and physical properties of the commodity that make it valuable to individuals.
So, the correct answer is option b.