Oxford, Cambridge and RSA (OCR) GCSE Computer Science Practice Exam

The component primarily responsible for executing instructions related to graphics is the GPU, or Graphics Processing Unit. The GPU is specifically designed to handle complex calculations and processes involved in rendering images, video, and animations. This specialization allows it to perform these tasks much more efficiently than a general-purpose CPU.

In contrast, the CPU (Central Processing Unit) is the main processing unit of a computer, handling a wide range of tasks but not optimized specifically for graphics processing. RAM (Random Access Memory) provides temporary storage for data that the CPU or GPU may need to access quickly, but it doesn't execute instructions by itself. The power supply is responsible for distributing electrical power to the computer's components, but it does not involve any processing or execution of tasks, especially not those related to graphics. Thus, the GPU's design makes it the ideal choice for executing graphic-related instructions.