Final answer:
Globular clusters contribute to tracing the large-scale structure of the Galactic disk by helping astronomers map out the distribution of these clusters and infer the shape and structure of the disk.
Step-by-step explanation:
Globular clusters play a significant role in tracing the large-scale, three-dimensional structure of the Galactic disk. These clusters are distributed in a spherical halo surrounding the flat disk of our Milky Way galaxy.
By studying the positions and distances of globular clusters, astronomers can map out the distribution of these clusters and infer the shape and structure of the Galactic disk. This information helps us understand the overall structure of our galaxy and the processes that led to its formation and evolution.