Final answer:
Purchasing farmed shrimp or farmed scallops depends on personal preference.
Step-by-step explanation:
If the student values higher nutritional value, they may prefer purchasing farmed shrimp, as shrimp is a good source of omega-3 fatty acids and protein. On the other hand, if the student is concerned about the environmental impact, they may prefer purchasing farmed scallops, as scallop farming tends to have a lower environmental impact compared to shrimp farming.