Key Stage 3 (KS3) Geography Practice Test 2025 – The Comprehensive All-in-One Success Guide!

Biodiversity plays a crucial role in maintaining the health and stability of ecosystems. It refers to the variety of life forms, including the different species of plants, animals, and microorganisms, as well as the genetic diversity within these species and the ecosystems they inhabit. High levels of biodiversity contribute significantly to ecosystem resilience, allowing communities to better withstand environmental changes, such as climate shifts, diseases, and natural disasters.

In diverse ecosystems, species interact with one another in complex ways, such as through food webs and nutrient cycles. This interconnectivity facilitates the functioning of the ecosystem, helping it to adapt to changes and recover from disturbances. For example, if one species declines due to a disease, other species can fill its ecological role, maintaining the balance of the ecosystem.

In contrast, options that suggest biodiversity is linked to waste increase, limits variation, or reduces climate variability misinterpret the role of diversity in ecosystems. Biodiversity is fundamentally about variety and interdependence, all of which are essential for sustaining ecosystem services that humans rely on, such as clean air, water, pollination, and food production.