To answer this question, you need to understand the basic components of a computer system.
Option A) Hardware - This option is correct. Hardware refers to the physical components of a computer that can be seen and touched, such as the monitor, keyboard, mouse, hard drive, and motherboard. These components are responsible for executing the instructions provided by the software.
Option B) Software - This option is incorrect. Software refers to the programs, applications, and data that are stored on and executed by the computer's hardware. It is not the physical aspect of the computer that can be seen.
Option C) Operating system - This option is incorrect. An operating system is a software that manages computer hardware and software resources and provides common services for computer programs. It is not the physical aspect of the computer.
Option D) Application program - This option is incorrect. An application program, also known as software application or simply app, is a computer program designed to perform specific tasks or functions for the user. It is not the physical aspect of the computer.
The correct answer is A) Hardware. This option is correct because hardware refers to the physical components of a computer that can be seen.