The correct answer is option 1, the 13th Rock Edict. This Rock Edict of Asoka provides a description of the horrors of the Kalinga War. Asoka was an ancient Indian emperor who ruled a vast empire in the 3rd century BCE. The Kalinga War was a significant event during his reign, which resulted in a massive loss of life and suffering. The 13th Rock Edict is particularly important because it reflects Asoka`s remorseful state of mind after witnessing the devastating consequences of the war.

Option 2, the Kalinga Edict at Dhauli, refers to a specific location where an edict related to the Kalinga War can be found. However, it does not provide a description of the horrors of the war itself.

Option 3, the Edict at Jaugada, is another rock edict of Asoka but does not specifically pertain to the Kalinga War or its horrors.

Option 4, the 10th Rock Edict, also does not specifically describe the horrors of the Kalinga War.

Therefore, option 1, the 13th Rock Edict, is the correct answer as it directly addresses the horrors of the Kalinga War.