Answer: c. GPU (Graphics Processing Unit) is the correct answer.
Explanation: A graphics processor is a specialized type of processor designed to handle the complex calculations required for rendering graphics and images. It is the primary component responsible for producing the images you see on your computer screen. While AGP (Accelerated Graphics Port) and HDMI (High-Definition Multimedia Interface) are both types of interfaces used to connect a graphics card to a computer system, they are not necessary for a graphics processor to function. RAM (Random Access Memory) is important for overall system performance, but it is not a requirement specifically for a graphics processor.