Match each storage medium to its correct functional description: Storage Media: 1. CD-R (Compact Disc Recordable) 2. CD-RW (Compact Disc Rewritable) 3. USB Pen Drive Descriptions: A. Solid-state electronic storage device that can be easily connected and removed via USB B. Optical storage disc that can be written to only once and cannot be erased C. Optical storage disc that can be erased and rewritten with new data multiple times

### Why this is right A **Compact Disc Recordable (CD-R)** stores data as marks read by a laser, and those marks cannot be erased, so it is written to once. A **Compact Disc Rewritable (CD-RW)** uses a recording layer that can be changed repeatedly, while a **Universal Serial Bus (USB) pen drive** stores data electronically in removable solid-state memory. ### The concept Optical discs store data in patterns that a laser reads. A CD-R is designed for one-time recording: after data is written, it cannot be erased to make room for different data. A CD-RW has a rewritable layer that can be changed, so you can erase its contents and record new data multiple times. A pen drive is a small electronic storage device that connects to a computer through a USB port and can be plugged in or removed as needed. Unlike optical discs, it uses solid-state memory, meaning electronic circuits store the data rather than a laser-readable disc surface. ### The pairs | Item | Matches | Why | |---|---|---| | Compact Disc Recordable (CD-R) | B. Optical storage disc that can be written to only once and cannot be erased | Its recording layer is not designed to be erased and reused. | | Compact Disc Rewritable (CD-RW) | C. Optical storage disc that can be erased and rewritten with new data multiple times | Its recording layer can be changed repeatedly, allowing new data to replace old data. | | USB pen drive | A. Solid-state electronic storage device that can be easily connected and removed via USB | It stores data in electronic memory and connects through a USB port. | ### Watch out Both CD-R and CD-RW are optical discs, so the key distinction is whether the data can be erased and rewritten. “Recordable” alone does not mean “rewritable.” ### Terms - **CD-R**: Compact Disc Recordable. An optical disc designed to be recorded on once. - **CD-RW**: Compact Disc Rewritable. An optical disc designed to be erased and recorded on again. - **USB**: Universal Serial Bus. A connection standard used to attach devices such as pen drives to computers. - **Optical storage**: Data storage read or written using light, typically a laser. - **Solid-state memory**: Electronic storage with no moving parts, used in devices such as pen drives. - **Pen drive**: A small, removable electronic storage device that usually connects through a USB port. ### Remember CD-R is generally one-time storage, CD-RW can be reused, and a pen drive stores data electronically.