What do you understand by the given statement: The path length covered by a body is zero.

Hint: A displacement is a vector in geometry and mechanics whose length is the smallest distance between the beginning and final positions of a moving point P. It measures the distance and direction of net or total motion along a straight line from the point trajectory's beginning location to its end position. The translation that translates the original position to the end position can be used to identify a displacement.

Complete Step By Step Answer:
Work is the energy delivered to or from an item by applying force along a displacement in physics. It is frequently expressed as the product of force and displacement in its simplest form. When applied, a force is said to produce positive work if it has a component in the direction of the point of application's displacement. If a force has a component that is opposite the direction of displacement at the point of application, it produces negative work.
The final position is the same as the original position if the body has not changed at all from its starting position. The displacement of the object must therefore be zero. As a result, no job is completed. When force and displacement are perpendicular to one another or when no force or displacement exists. When we walk with a thing in our hands, the force operates in a downward direction, while displacement acts in a forward direction. The term "displacement" refers to a shift in an object's location. It is a vector quantity with a magnitude and direction.

Note:
Examples of zero work
When we hold an object and walk, the force works in a downward direction. When displacement operates in a forward direction, the force acts in a downward direction.
If you push a wall and it doesn't move, you haven't accomplished anything.
Sleeping for numerous hours is another example of not working.