Final answer:
The HP LaserJet M451dw uses a toner cartridge for printing. Unlike inkjet printers that spray ink, laser printers use a powder toner that is electrostatically applied and melted onto paper. so, option a is the correct answer.
Step-by-step explanation:
The HP LaserJet M451dw laser printer uses a toner cartridge. In laser printing technology, a dry black powder called toner is sprayed with a negative charge and attracted to the positively charged regions of a drum. The paper, carrying a greater positive charge, pulls the toner from the drum. Through heated pressure rollers, the toner is melted and permanently fixed to the paper's fibers, creating the printed image or text.
Laser printers, such as the HP LaserJet series, are different from inkjet printers, which use ink cartridges and spray ink through nozzles onto the paper, also utilizing an electrostatic charge to direct the droplets precisely. Laser printers are often preferred for their speed and cost-effectiveness for large volumes of printing, making them a popular choice for business and office settings.