The main goal of conservation biology is to protect endangered species and their habitats.

Habitat destruction is the primary cause of biodiversity loss, as it leads to the loss of species and ecosystems.

Ex-situ conservation focuses on the captive breeding of endangered species outside their natural habitats.

The primary focus of the Convention on Biological Diversity (CBD) is sustainable development and the conservation of biological diversity.

Biodiversity hotspots are significant because they are regions with a high number of endemic species and are under threat from human activities.

Endemic species are those that are found nowhere else on Earth and are often vulnerable to extinction.

Local extinction refers to the extinction of a species in a specific habitat while it still exists in other areas.

Extirpation refers to the loss of a species from a particular habitat, while extinction refers to the loss of a species globally.

Species diversity refers to the variety of life in a particular habitat or ecosystem.

Biodiversity refers to the variety of life in the world or in a particular habitat.

All of the above options are direct threats to biodiversity, affecting species and ecosystems.

Urbanization is a major threat to biodiversity as it leads to habitat loss and fragmentation.

Wildlife sanctuaries are a method of in-situ conservation as they protect species in their natural habitats.

Elephants are considered a keystone species because they play a critical role in maintaining the structure of their ecosystem.

Aquariums are an example of ex-situ conservation as they involve the conservation of species outside their natural habitats.

Increased pollution is not a benefit of biodiversity; rather, biodiversity helps in reducing pollution.

Sustainable tourism can help conserve biodiversity by promoting responsible travel that does not harm ecosystems.

Sustainable agriculture practices help in conserving biodiversity by maintaining healthy ecosystems.