Answer :
Inertia is something which continues doing what it's doing/going where it's going until an external force does something to change it.
Since the laws of motion state that an object at rest stays at rest and an object in motion stays in motion unless acted on by an outside force, inertia is inherently a part of these laws.
Since the laws of motion state that an object at rest stays at rest and an object in motion stays in motion unless acted on by an outside force, inertia is inherently a part of these laws.
