Biologists explain the higher species richness in tropical regions through the following reasons:
- Stable Climate: Tropical regions have a stable climate over long periods, which supports the survival and evolution of diverse species.
- Higher Solar Energy: These regions receive abundant solar energy, increasing productivity and resource availability, which supports a higher number of species.
- Absence of Severe Climatic Changes: Unlike temperate regions, tropical areas experience minimal climatic disruptions, allowing uninterrupted species evolution.

| S. No. | Particulars | Amount (in ₹ crore) |
|---|---|---|
| (i) | Operating Surplus | 3,740 |
| (ii) | Increase in unsold stock | 600 |
| (iii) | Sales | 10,625 |
| (iv) | Purchase of raw materials | 2,625 |
| (v) | Consumption of fixed capital | 500 |
| (vi) | Subsidies | 400 |
| (vii) | Indirect taxes | 1,200 |