比萨斜塔为什么是斜的英文回答？

The Leaning Tower of Pisa is slanted due to its unstable foundation. The tower was built on soft ground consisting of clay, sand, and shells, which caused the tower to start tilting during construction itself. Initially, the inclination was not intentional, but as the tower continued to lean, efforts were made to stabilize and correct the tilt. However, despite these efforts, the tower remains visibly slanted. Its distinctive lean has become one of the main reasons behind its worldwide fame and attracts millions of tourists every year. The unique architectural flaw has now become a symbol of the enduring human spirit in the face of imperfection.