The correct statement among the given options is option 4: "The South-East Asian islands are not rich in biodiversity." This statement is not correct because the South-East Asian islands are actually known for their rich biodiversity.
Option 1 states that the Eastern Himalayas and Western Ghats are the two biodiversity hotspots in India. This statement is correct. Both regions are recognized for their high levels of species diversity and endemism.
Option 2 states that the Central American lowland and highland forests are identified as biodiversity hotspots. This statement is also correct. Central America is known for its diverse ecosystems, and the lowland and highland forests support a wide range of species.
Option 3 states that biodiversity hotspots are mostly confined to the tropical and subtropical regions of the world. This statement is correct. Biodiversity hotspots are areas that have a significant concentration of species and face high levels of habitat loss. These hotspots are typically found in tropical and subtropical regions due to the favorable climatic conditions for biodiversity.
In conclusion, option 4 is incorrect as the South-East Asian islands are indeed rich in biodiversity.