答案:The destruction of the cleft can refer to several things, but without specific context, it's hard to pinpoint the exact reason. Here are a few possibilities:
1. Geological events: Natural disasters like earthquakes or erosion can cause the destruction of geological clefts or fissures.
2. Construction: In some cases, clefts or gaps in the earth may be destroyed during construction or mining activities.
3. Environmental degradation: Human activities can lead to the destruction of natural features like clefts, especially in sensitive ecosystems.
4. Symbolic: In literature or art, the destruction of a cleft could symbolize a rift or division.
More context is needed for a precise answer.