What can cause stone tile to wear prematurely?

The correct answer is related to the impact of improper sealing on stone tile. Stone tiles are porous and require a proper seal to protect them from stains, moisture, and wear. If stone tile is not sealed appropriately, it can lead to absorption of dirt and water, compromising the integrity and appearance of the tile.

Improper sealing allows substances to penetrate the stone, making it vulnerable to damage from foot traffic and other environmental factors. Over time, this can result in dullness, discoloration, and even physical wear on the surface of the tile, thereby reducing its lifespan.

Other options such as water-based thin-set and sanded grout may not directly relate to the wear of the stone tile itself, and while excessive foot traffic can contribute to wear, it is generally more relevant to the surface finish and structural durability. However, the key factor in preventing premature wear lies in the sealing process, which safeguards the tile against various elements that could lead to deterioration.