Passage Summary: Meerkats that act as guards are actually safer than the ones looking for food. The author argues that because these guards bark to warn others while they escape, their behavior is unselfish.

Conclusion: The behavior of meerkat sentinels is motivated, at least in part, by altruism.

Reasoning: Sentinels watch for predators and bark to warn the group while they run for cover, even though they are less likely to be caught than the foragers they are alerting.

Analysis: The author commits a classic error by assuming that because a behavior has a beneficial effect on others, the *intent* behind the behavior must be altruistic. While the bark does alert the group, the author fails to consider that the bark might be a self-interested survival mechanism or a reflexive response that happens to help others. Look for an answer that highlights this leap from an observed benefit to a specific internal motivation, especially since the sentinel is already noted to be at lower risk than the foragers.