The accurate comparison between habitat preservation and laws that protect biodiversity is not perfectly encapsulated in any of the provided statements. However, a more accurate understanding is:
Habitat preservation typically focuses on maintaining the natural environment where multiple species can thrive, thereby supporting entire ecosystems, while laws aimed at biodiversity protection may target specific species or habitats to prevent their decline or extinction, often encompassing broader conservation efforts that include habitat preservation.
None of the provided options accurately reflect this nuanced perspective. Nonetheless, if I had to choose the closest option with the understanding that both approaches have their own merits and methods of contributing to biodiversity, I'd say:
"Only habitat preservation has been shown to actually help protect biodiversity."
This could be misleading as it suggests that laws have no impact, but habitat preservation is generally recognized as crucial for protecting biodiversity as a whole. Therefore, it's essential to recognize that both habitat preservation and biodiversity laws play vital roles in conservation efforts.