One of the following statements is incorrect with reference of biodiversity. Identify it.

• A. The areas with very few plant and animal species (low species richness) with no threatened species are called biodiversity hotspots.
• B. Biodiversity increases from higher altitudes to lower altitudes.
• C. Biodiversity decreases from the equator to polar regions.
• D. Depletion in genetic diversity of crop plants is mainly due to the introduction of better varieties with high yield, disease resistance, etc.