Passage Summary: We should let the moths eat the trees because they help clear out the overgrowth caused by humans putting out too many forest fires.

Conclusion: We should allow the moth outbreak to continue in most parts of the forest.

Reasoning: The moths provide a benefit by thinning out unnaturally dense areas of immature trees caused by fire suppression.

Analysis: To support the conclusion that we shouldn't counter the moths in *most* of the forest, the missing piece needs to show that the 'crowded' condition is widespread. If the moths are only helpful in a tiny corner, the conclusion wouldn't follow. Look for an answer that indicates the 'unnaturally crowded' condition applies to the majority of the forest area mentioned. This bridges the gap between a specific benefit and a general policy.