Step 1: Understanding Biotic and Abiotic Resources
Resources are classified into biotic and abiotic categories. Biotic resources are those that are derived from living organisms, while abiotic resources are non-living, such as minerals and rocks.
Step 2: Identifying Biotic Resources
Fisheries, which include fish and other marine organisms, are biotic resources because they are living organisms.
Step 3: Conclusion
Iron, copper, and rocks are all examples of abiotic resources as they are non-living. Thus, fisheries is the correct example of a biotic resource.
The correct answer is option (C).
The value of $\dfrac{1+\cot^2 \theta}{1+\tan^2 \theta}$ will be: