Option a is the correct answer reason pls search on Google or all in one of the following answers

Mechanical Teacher

A mechanical teacher is an electronic device that is designed to replace a real-life teacher in the classroom. It is a type of teaching tool that uses technology to impart knowledge and information to students. Mechanical teachers are commonly found in science fiction stories and movies, but they are becoming increasingly popular in real-life classrooms as well.

Features of Mechanical Teacher

The following are some of the key features of a mechanical teacher:

- It is an electronic device that is designed to teach students in a classroom setting.
- It uses a combination of video, audio, and text-based materials to impart knowledge to students.
- It can be customized to meet the specific needs of students based on their age, grade level, and learning style.
- It can provide instant feedback to students on their progress and performance.
- It can be programmed to teach a wide range of subjects, including math, science, history, and literature.

Advantages of Mechanical Teacher

There are several advantages of using a mechanical teacher in the classroom, including:

- It can provide a consistent and reliable source of information to students.
- It can be customized to meet the individual needs of students.
- It can provide instant feedback to students on their progress and performance.
- It can reduce the workload of teachers, allowing them to focus on other aspects of teaching.

Disadvantages of Mechanical Teacher

However, there are also some disadvantages to using a mechanical teacher in the classroom, including:

- It may not be able to provide the same level of interaction and engagement as a real-life teacher.
- It may not be able to adapt to unexpected situations or changes in the classroom environment.
- It may not be able to motivate students in the same way that a real-life teacher can.

In conclusion, a mechanical teacher is an electronic device that is designed to replace a real-life teacher in the classroom. While it has several advantages, including the ability to customize to meet the individual needs of students and provide instant feedback, it also has some disadvantages, including the inability to provide the same level of interaction and engagement as a real-life teacher.