Habitat destruction, such as deforestation, urbanization, and agricultural expansion, is the leading cause of biodiversity loss.

Mass extinction refers to the rapid disappearance of a large number of species in a relatively short period of time.

Deforestation is primarily a threat to terrestrial biodiversity, while overfishing, pollution, and climate change are major threats to marine biodiversity.

Invasive species are non-native species that have been introduced to an ecosystem and have become a threat to native species.

Pollution control is not specifically aimed at protecting biodiversity, although it can have positive impacts on ecosystems.

Conservation biogeography is the study of the distribution and abundance of species and the factors that influence them, with the goal of developing strategies for conserving biodiversity.

Ramsar sites are wetlands of international importance, designated under the Ramsar Convention on Wetlands.

Habitat fragmentation is the process by which a habitat is divided into smaller and isolated patches, often due to human activities.

Keystone species are species that have a disproportionately large impact on their ecosystem relative to their abundance.

Adaptation is the process by which species change over time in response to changes in their environment.

Sustainable harvesting is not specifically aimed at protecting endangered species, although it can help to reduce the pressure on wild populations.

Migration is the seasonal movement of animals from one area to another.

Temperate grasslands are not considered to be biodiversity hotspots, as they are not as species-rich as other ecosystems.

Evolution is the process by which species change over time in response to changes in their environment.

Pollution control is not specifically aimed at protecting biodiversity, although it can have positive impacts on ecosystems.