Which component is responsible for the performance of tasks in a computer?

The central processing unit (CPU) is the primary component responsible for executing instructions and performing tasks in a computer. It acts as the brain of the computer, processing data and managing the flow of information between different parts of the system. The CPU interprets and executes program instructions, which can range from arithmetic operations to complex algorithms.

When a user runs a program or performs an action, the CPU retrieves and processes the relevant instructions from memory, performs calculations, and sends results back to RAM or other components for storage or display. This capability makes the CPU crucial for the overall performance and speed of the computer.

While components like the motherboard, RAM, and network interface card play essential roles in the computer's functionality, they do not directly perform tasks in the way that the CPU does. The motherboard serves as the main circuit board that connects all components, RAM temporarily holds data and instructions for quick access, and the network interface card facilitates network communication but does not process tasks. Thus, the CPU's role as the executor of commands makes it the correct answer in relation to task performance.