Biodiversity

In the context of environmental science and biology, various types of conservation methods are applied to protect species. One key type is taking threatened species out of their natural habitat and placing them in special settings. This process involves:

1. Identifying the threatened species in their original, often endangered, habitats.
2. Extracting these species carefully to ensure their survival and minimal disturbance to existing ecosystems.
3. Providing a controlled environment where the species' needs such as food, shelter, and safety from predators can be met.
4. Utilizing specially designed areas like wildlife reserves, botanical gardens, and zoos to ensure a long-term protection strategy.

Based upon these descriptors, this type of conservation is known as Biodiversity conservation. This approach focuses on maintaining and restoring varied forms of life and ensuring they are conserved ex-situ, that is, outside their natural habitats.

The Verhulst-Pearl logistic growth model represents population growth with a limiting factor, , which is the carrying capacity of the environment.

- represents the intrinsic rate of natural increase.

- is the maximum population size that the environment can sustain indefinitely, taking into account resource limitations.

Thus, the correct answer is (3) Carrying capacity.