Final answer:
The best way to increase wildlife numbers is through A) habitat preservation, which aims to protect and restore natural environments to support all native species. Invasive species and increased hunting typically have negative effects, while conserving key species.
Step-by-step explanation:
The best method to increase wildlife numbers in an environmentally sustainable way is A) Habitat preservation.
This method focuses on maintaining or restoring the natural environment to benefit all species within the ecosystem.
The introduction of invasive species, as mentioned in options B and C, can lead to decreased biodiversity and potentially disrupt the ecological balance by displacing native species and altering community structures.
Habitat restoration is an essential aspect of preserving biodiversity, as evidenced by the reintroduction of wolves in Yellowstone National Park, which resulted in positive changes to the ecosystem and an increase in species diversity.
Restoring a keystone species, such as the wolf in Yellowstone, can help maintain the diversity and stability of ecosystems.
Contrarily, increasing hunting could further endanger wildlife populations and upset the balance of the ecosystem.
Instead, focusing on creating and maintaining quality preserves and targeting conservation efforts with greater attention to biodiversity protection is vital for the long-term sustainability of wildlife populations.