A printer converts a soft copy to hard copy, hence option 'A' is correct.

Question: A device that converts soft copy to hard copy
Answer: Printer
Explanation:
The device that converts soft copy to hard copy is a printer. Here is a detailed explanation:
Definition:
A printer is an output device that produces a hard copy (physical copy) of electronic documents or images that are stored in soft copy (digital form) on a computer or other digital device.
Working:
When a soft copy is sent to a printer, it follows these steps to convert it into a hard copy:
1. Data Processing: The printer receives the digital data from the computer, which includes text, images, and formatting instructions.
2. Page Description Language (PDL) Conversion: The printer translates the digital data into a language that it can understand, such as PostScript or Printer Command Language (PCL).
3. Rasterization: The printer converts the digital data into a bitmap image, which represents the content of the document or image.
4. Transfer to Paper: The printer transfers the bitmap image onto a physical medium, which is typically a sheet of paper.
5. Ink or Toner Application: The printer applies ink or toner onto the paper to reproduce the content of the digital document or image.
6. Finishing: The printer may perform additional actions, such as duplex printing (printing on both sides of the paper), stapling, or collating, depending on its capabilities.
Types of Printers:
There are various types of printers available, including:
- Inkjet printers: These printers use small nozzles to spray tiny droplets of ink onto the paper.
- Laser printers: These printers use a laser beam to create an electrostatic image on a drum, which attracts toner particles that are transferred onto the paper.
- Dot matrix printers: These printers use a print head with multiple pins to strike an inked ribbon, creating dots that form characters or images.
- Thermal printers: These printers use heat to transfer ink onto the paper, typically used for printing receipts or labels.
Advantages of Printers:
- Produces high-quality output with sharp text and vibrant colors.
- Can print on various sizes and types of paper, including plain paper, photo paper, envelopes, and labels.
- Offers different printing options, such as duplex printing, borderless printing, and poster printing.
- Can be connected to multiple devices, such as computers, smartphones, and tablets, through wired or wireless connections.
In conclusion, a printer is the device that converts soft copy to hard copy by reproducing digital documents or images onto physical paper using ink or toner.