Introduction:
A computer is an electronic machine that performs various tasks by executing instructions. It is a versatile device that can process data, store information, and perform complex calculations. In this response, we will discuss why a computer is considered an electronic machine.

Explanation:
a) Electronic Machine:
A computer is classified as an electronic machine because it primarily uses electronic components to perform its functions. These components include transistors, integrated circuits, and other electronic elements.

1. Components:
- Transistors: Transistors are tiny electronic switches that control the flow of electricity within a computer. They are used to store and process information in the form of binary digits (bits), which are represented as 0s and 1s.
- Integrated Circuits: Integrated circuits (ICs) are small electronic circuits that are etched onto a semiconductor material. They are responsible for performing various functions in a computer, such as arithmetic operations, memory storage, and communication.

2. Electrical Signals:
Computers work by using electrical signals to represent and manipulate data. These signals are transmitted through electronic components, allowing the computer to process information.

3. Power Supply:
Computers require electrical power to function. They are connected to a power source, such as a wall outlet, which provides the necessary electricity to run the electronic components.

4. Input and Output:
Computers receive input from users through electronic devices such as keyboards, mice, and touchscreens. They process this input using electronic components and produce output through devices like monitors, speakers, and printers.

5. Storage:
Computers use electronic storage devices, such as hard disk drives and solid-state drives, to store data. These storage devices use electronic components to store and retrieve information.

Conclusion:
In conclusion, a computer is considered an electronic machine because it primarily uses electronic components, relies on electrical signals, and requires a power supply to function. It processes data, stores information, and performs various tasks using electronic circuits and components.