Final answer:
The CPU processes data and instructions, making option 1 the correct answer to what a CPU does in a computer.
Step-by-step explanation:
The CPU (Central Processing Unit) is essentially the brain of the computer. It performs the vital function of processing data and instructions. The CPU executes a series of instructions, each one changing the state of the computer's memory, which stores data, in a way that is designed to solve a particular problem or perform some action. Although computers can store data and instructions, connect to the internet, and display output on the screen, the CPU's specific task is to process the information, not to store it, display it, or establish internet connections. Therefore, the correct answer to the student's question, 'Which of the following best describes what the CPU does?' is option 1) Processes data and instructions.