Conservation biology is a multidisciplinary scientific field that focuses on protecting and managing biodiversity, including species, ecosystems, and habitats, from extinction and degradation.

Here's why this definition is comprehensive:

* Multidisciplinary: Conservation biology draws upon various disciplines like ecology, genetics, evolutionary biology, economics, and social sciences.

* Biodiversity: It emphasizes the protection of all levels of biological diversity, from individual species to entire ecosystems.

* Extinction and Degradation: It aims to prevent the loss of species and habitats due to human activities like habitat destruction, pollution, climate change, and invasive species.

* Management: It goes beyond just studying biodiversity. It focuses on developing and implementing strategies for the conservation and restoration of natural systems.

While other definitions might be simpler, this one captures the breadth and depth of the field while highlighting its critical role in safeguarding the planet's biodiversity.