Why does a rock have sharp corners?

A rock may have sharp corners due to the process of weathering and erosion, where natural forces like wind, water, and ice break down the rock into smaller fragments. These processes can create angular edges as the rock is fractured and worn away. Additionally, the rock's mineral composition and the manner in which it formed can influence its shape, with some rocks being less resistant to erosion and breaking more easily along natural fault lines. Over time, these factors contribute to the sharp corners observed in certain rocks.