The given question asks to select the correct statement about biodiversity from the provided options. Let's examine each statement:
This statement suggests that desert areas have high biodiversity. While deserts can have unique species adapted to their environment, they are not typically characterized by a high level of species richness compared to regions like tropical forests or the Western Ghats. Thus, this statement is not entirely accurate in terms of high biodiversity.
The Western Ghats, a UNESCO World Heritage Site, are known for their high biodiversity and a significant number of endemic species—species that are found nowhere else in the world. This region has been recognized for its ecological and biological significance, making this statement correct.
Biodiversity conservation is a global concern, with relevance to both developed and developing countries. It is crucial for maintaining ecological balance and supporting human economies and livelihoods globally. Therefore, this statement is misleading and incorrect.
Bt Cotton, a genetically modified crop, is designed to resist certain pests. However, concerns have been raised about its potential impacts on biodiversity, such as affecting non-target organisms and leading to changes in pest and predator dynamics. Thus, saying it has no adverse effects on biodiversity is not entirely accurate.
Based on the analysis, the correct answer is:
Therefore, option 2 correctly describes the biodiversity significance of the Western Ghats.
