Is revolution the only way to accomplish a task?

No, it is not.

Revolution is being done in order to change a situation in a more forceful way.  Over the course of our life this happen very rarely. Most task is accomplished through the process of negotiation, finding common grounds, and create a compromise that satisfy all group involved.

The given statement, "revolution is the only way to accomplish a task" is false.

Explanation:

Revolution is not the only way to accomplish a task. It can be said that revolution is one of the ways to accomplish a task and is done to change a situation in a forceful way.

This can happen very rarely. Task is a certain piece of work or responsibility or duty of an individual or a group. There are several ways to accomplish a task namely,

When accomplishing a task is done by a group, the decisions taken should be made after creating a common compromise that satisfies all the members of the group is more important. Hence we can conclude that revolution is not the only way to accomplish a task.