What are the wedges that divide tracks on a disk called?

The correct choice is sectors because in the context of disk storage, sectors are the subdivisions of a track on a disk. Each sector holds a specific amount of data, typically 512 bytes or 4096 bytes, and they serve as the smallest unit of storage that can be read from or written to the disk. This systematic division allows for efficient data management, retrieval, and organization on the physical media.

In contrast, segments refer to portions of memory or code in programming and do not specifically pertain to the physical layout of data on a disk. Partitions denote divisions of a hard drive into separate areas that can function independently, used for organizing data across different volumes but not specifically related to the subdivision of tracks into smaller parts. Chapters, typically associated with books or documents, do not apply to technical storage terminology within computer science. Therefore, sectors are the precise term for the wedges that partition tracks on a disk.