Which of the following is a characteristic of conservative force?

Work done by it is completely recoverable.

The correct answer is option 2. Work done by it is completely recoverable.

A characteristic of conservative force is work done by it is completely recoverable.

In physics, a conservative force is one for which the work done in moving an object from one point to another is independent of the path taken. This means that the work done by a conservative force is determined only by the initial and final positions of the object and not by the specific path taken between them. Additionally, conservative forces are associated with a potential energy function, and the work done by a conservative force can be completely recovered as potential energy stored in the system.

Therefore, the statement "Work done by it is completely recoverable" accurately describes a characteristic of conservative force.