The correct answer is option 1 and 3 only. BirdLife International is indeed a global partnership of conservation organizations focused on the study and conservation of birds and their habitats. It is also responsible for identifying Important Bird and Biodiversity Areas (IBAs), which are critical sites for the conservation of bird populations and broader biodiversity. However, the concept of 'biodiversity hotspots' originates from researchers such as Norman Myers and is not exclusively linked to BirdLife International, making statement 2 incorrect. This distinction is significant in understanding the varied approaches to conservation and the diverse organizations engaged in the protection of global biodiversity.