Final answer:
Orlando di Lasso's work is most closely associated with the reforms from the Council of Trent.
Step-by-step explanation:
The composer whose work is most closely associated with the reforms from the Council of Trent is Orlando di Lasso. Lasso was a prolific composer during the late Renaissance period and was highly regarded for his sacred music, which adhered to the liturgical forms and reforms set forth by the Council of Trent. His compositions exemplified the Counter-Reformation ideals, emphasizing the importance of religious art and the proper use of sacred music in worship.