Let’s break it down:

- Hard disks are divided into concentric circles called tracks.
- Each track is then split further into smaller pieces. These pieces are called **sectors**.
- Clusters are just groups of sectors that the file system manages together, not a direct subdivision of tracks.
- Vectors aren’t a thing in hard disk structure—maybe in math class, but not here.
- Heads are the physical parts that read or write data on the disk, not a way to subdivide tracks.

Here’s what really matters:
**The correct answer is Option 2 – Sectors.** ✅

YOUR ANSWER IS RIGHT