Final answer:
Constantin Brancusi's sculpture 'The Kiss' is associated with the Proto-Cubism art movement, which was a precursor to the fully developed Cubist style.
Step-by-step explanation:
The sculpture titled The Kiss by Constantin Brancusi belongs to an art movement that is often associated with a departure from traditional forms and the embrace of modernism. Brancusi's work is more accurately described in the context of Proto-Cubism, a term used to describe early forms of Cubism, rather than Impressionism, Renaissance, or the fully matured Cubist movement. Proto-Cubism signifies the transitional phase when artists began experimenting with forms and perspectives that led to the establishment of Cubism as a distinct art movement.