Read the following passage about humanoid robots and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks

Wildlife conservation, ___(1)___, often receives insufficient attention regarding research into its effectiveness and impacts, both positive and negative.
One innovative approach in wildlife conservation involves establishing protected areas. The introduction of protected areas and habitat restoration efforts have shown promising results in preserving endangered species and their ecosystems. Conservation efforts have also been integrated into sustainable development projects and ecotourism initiatives, ___(2)___.
Despite their limitations, ___(3)___. However, these efforts sometimes neglect the connectivity and corridors crucial for species migration and adaptation in response to climate change.
There is a lack of monitoring of conservation practices and no comprehensive studies on their long-term ecological impacts. Questions remain about the effectiveness of captive breeding programs versus habitat restoration in restoring populations of endangered species.
Further research should explore various conservation strategies, ___(4)___ and the impacts of climate change on wildlife habitats. Comparative studies between different conservation approaches are also necessary to understand which methods are most effective in different ecological contexts.
Overall, while wildlife conservation efforts have made significant strides, there is still limited evidence on the ___(5)___. Challenges such as habitat fragmentation and illegal wildlife trade persist, necessitating ongoing research and adaptive management strategies.
(Adapted from various sources on wildlife conservation)