Step 1: Concept
"Jute," "Cotton," and "Wool" are all types of natural fibers used for textiles.
Step 2: Analysis
The goal is to find another set consisting of three members of the same biological or commercial group.
Step 3: Evaluation
- "Shark," "Cod," and "Eel" are all types of fish.
- This set matches the "class of species/items" relationship.
Step 4: Conclusion
The correct group is in option (d).
Final Answer: (d)