Passage Summary: If we want to save an endangered species, we have to understand it. To understand it well, we need to study as many individual members of that species as we can. Therefore, the more we study, the better our chances of saving them.

Conclusion: Studying a larger number of individuals of an endangered species increases the likelihood of saving that species.

Reasoning: Saving a species depends on understanding its niche and behavior, and understanding that niche and behavior depends on studying more individuals.

Analysis: This argument follows a simple transitive logic: A (studying more individuals) leads to B (better understanding), and B (better understanding) leads to C (better chance of saving the species). The most logical conclusion is the one that connects the beginning of the chain to the end. Look for an answer that states that increasing the number of individuals studied directly improves the prospects for the species' survival.