Band 8.5 model answer

The rate at which species are disappearing has accelerated dramatically in recent decades, prompting scientists to describe the present era as a sixth mass extinction event. Understanding the main causes of this crisis and identifying effective solutions is essential for preserving the biodiversity on which all life depends.

Habitat destruction is the dominant cause. As human populations grow and demand for agricultural land, timber and urban space expands, the forests, wetlands and grasslands that support most of the world's species are cleared at unprecedented rates. The Amazon basin, which contains roughly ten per cent of all species on Earth, loses millions of hectares each year to cattle ranching and soya cultivation. Alongside habitat loss, the illegal wildlife trade devastates populations of high-profile species, elephants, rhinoceroses, pangolins, whose body parts command extraordinary prices on black markets in Asia. Climate change constitutes a third and increasingly significant driver, shifting temperature and rainfall patterns faster than many species can adapt, and bleaching coral reefs that support a quarter of all marine life.

Effective responses must address each driver. Expanding the global network of protected areas, with the ambitious target of conserving thirty per cent of land and ocean by 2030 now endorsed by many governments, would secure critical habitats if the protected zones are genuinely enforced and connected by wildlife corridors rather than existing only on paper. Combating the illegal wildlife trade requires tougher law enforcement and demand-reduction campaigns in consumer countries, particularly China and Vietnam, where attitudes towards wildlife products are gradually shifting. Integrating biodiversity goals into climate agreements, and compensating tropical nations for maintaining their forests rather than clearing them, addresses the underlying economic incentives that drive both deforestation and emissions.

Without these systemic interventions, the loss of species will continue to accelerate, impoverishing ecosystems and ultimately threatening the agricultural and medical resources that human societies depend upon.