When you say computers work diligently what do you mean Ans for class 9th?

It is a characteristic of computer.

Explanation:

Computers can work for many hours continuously without taking any rest and without decreasing its speed, accuracy and efficiency. It is free from tiredness,lack of concentration, fatigue etc.2)Versatile: -Computer is a versatile machine which can do varieties of task such as simple calculation to a complex and logical operation. It is used in various fields for various purposes.