Final answer:
The correct answer is D) portion, which represents a contiguous set of allocated blocks and can be used to refer to sections of a disk formatted for storage or specific use in computer systems.
Step-by-step explanation:
A portion is a contiguous set of allocated blocks. The correct answer to the question is D) portion. In the context of computer systems, a portion, often referred to as a partition or segment, is a continuous section of storage space on a disk that is allocated for a particular purpose, such as for a file system or for raw storage use. For example, when you format a hard drive, you typically divide it into different portions, with each portion potentially using a different filesystem or serving a different role within the computer's storage hierarchy.