Question

The velocity time graph of a body is parallel to the time axis. The body is​

Answer 1

The body is moving with a constant velocity or zero acceleration.

This type of graph shows that with the passage of time the velocity of the body is unaltered. Since, the velocity does not change, we call it a constant velocity or a zero acceleration phase.

Answer 2

In Velocity-Time graph if the line is parallel to the time axis then this means that velocity does not change at any time and thus velocity is Constant. Since the velocity doesn't change means there is no acceleration or retardation and thus the acceleration on this body is Zero!