Match the causes of biodiversity loss (The 'Evil Quartet') in List I with their corresponding examples from List II. List I List II A Habitat loss and fragmentation 1 Extinction of Passenger pigeon B Over-exploitation 2 Decline of indigenous catfishes due to Clarias gariepinus C Alien species invasions 3 Breakdown of obligatory plant-pollinator mutualism D Co-extinctions 4 Clearing of Amazon rain forest for cultivati

Step-by-step solution

Habitat loss and fragmentation is the most important cause driving animals and plants to extinction. The most dramatic examples of habitat loss come from tropical rain forests, such as the clearing of the Amazon rain forest for cultivating soya beans. Thus, A matches with 4. Over-exploitation by humans has led to the extinction of many species in the last 500 years, including the Steller's sea cow and the passenger pigeon. Thus, B matches with 1. Alien species invasions occur when alien species are introduced unint