Final answer:
Michelangelo used the term 'sprezzatura' to describe the effortless grace of the figures for the tomb of Pope Julius II, reflecting the Mannerism style. While initially ambitious, the tomb project was never completed to its full extent.
Step-by-step explanation:
Michelangelo used the term sprezzatura, which refers to a manner of dress, to describe the figures he planned for the tomb of Pope Julius II. The term sprezzatura denotes a certain nonchalance that allows one to act or to appear without apparent effort - in the Renaissance context, it often suggested grace, elegance, and sophistication. The figures on the tomb of Pope Julius II exhibit characteristics of Mannerism, a style that emerged as a reaction to the High Renaissance, characterized by complexity, exaggeration, and artifice.
While the original plan for the tomb was quite ambitious, involving over 20 life-sized sculptures, the project was never completed in its intended form. Michelangelo's sculpture for the tomb exemplified exuberant contrapposto, suggesting states such as sleep, death, or languor, and displayed the restrained beauty and ideal naturalism that can be linked to classical antiquity.