Passage Summary: Even though we are trying harder to save habitats, more animals are going extinct, so the author thinks the effort is pointless.

Conclusion: Efforts to protect the natural habitats of endangered species are a waste of time and resources.

Reasoning: Despite the increase in international conservation efforts, the rate of species extinction is still going up rather than down.

Analysis: To weaken this argument, we need to find a reason why the efforts might not be wasted even if extinction rates are rising. Perhaps the extinction rate would be significantly higher if these habitat protections weren't in place. Look for an answer that suggests the situation would be even worse without the current efforts, showing they are actually having a positive, albeit insufficient, impact.