What troubled Koly about the journey with Hari?

The journey with Hari troubled Koly primarily due to the presence of many dead people along the way. This haunting experience reflects the harsh realities faced by those who are traveling in conditions of despair and suffering, indicating the depth of loss and the challenges faced by the characters. Witnessing death in such a tangible manner would undoubtedly create a profound emotional impact on Koly, intensifying her feelings of anxiety and fear about her circumstances and the overall situation in which they find themselves.

The other options, while potentially troubling, do not convey the same level of immediacy and horror as the sight of dead bodies. A crowded train or a lack of food are certainly challenging aspects of travel, especially during a time of distress, but they may not carry the same weight of significance in shaping Koly’s sense of dread and the fragility of life. Similarly, the weather conditions, such as rain, may be an inconvenience but do not evoke the same visceral reaction as encountering death. Thus, the presence of deceased individuals stands out as the most troubling element of Koly's journey with Hari.