Final answer:
The CPU is the 'brain' of a computer, responsible for processing data through mathematical calculations and logical operations. It executes instructions and carries out computational tasks necessary for a range of applications, and its power lies within the microprocessor integrated circuit.
Step-by-step explanation:
The role of the CPU (Central Processing Unit) in a computing environment is multifaceted and essential for the functionality of a computer. The CPU is effectively the 'brain' of the computer, responsible for executing instructions and managing the data processing. Statement 3 best describes the role of the CPU: 'The CPU does the actual processing of the data, from mathematical calculations and logical operations to conversion of keyboard text entry to output display on your screen.' This involves reading and writing operations, as well as computational tasks that transform input into output. The CPU's operations are integral to a wide array of applications, from simple word processing to complex computational tasks like weather prediction or controlling mechanical devices such as car engines.
With the advent of microprocessors, the CPU's power was integrated into a single circuit, revolutionizing computing and making it possible for personal computers, as well as other electronic devices, to emerge. Microprocessors can be found in numerous devices, including appliances, automobiles, and personal computing devices, showcasing the versatility and depth of the CPU's role in modern technology.