Concept:
The Biological Diversity Act, 2002 was enacted by the Government of India to conserve biological diversity, ensure sustainable use of its components, and ensure fair and equitable sharing of benefits arising out of the use of biological resources.
Step 1: Understand the primary aim of the Act.
The main objective of the Act is to regulate access to biological resources of India and associated traditional knowledge, especially by foreign individuals, institutions, or companies.
Step 2: Analyze the given options.
• (A) To study rampant loss of natural resources → Not the primary objective $\times$
• (B) To set norms to reduce pollution → Covered under environmental protection laws, not this Act $\times$
• (C) For recording conservation status of plant and animal species → This relates to biodiversity documentation, not the main aim $\times$
• (D) For regulation of access to Indian biological resources → Correct objective of the Act \checkmark
Step 3: Conclusion.
Thus, the main objective of the Biological Diversity Act, 2002 is:
\[
\text{Regulation of access to Indian biological resources}
\]