The BEST example of Newton's 1st Law (inertia) from the options provided is:
A tennis player throws the tennis ball into the air for a serve and the ball falls to the ground.
This scenario illustrates the concept of inertia, which states that an object at rest stays at rest, and an object in motion stays in motion unless acted upon by an external force. In this case, the ball is thrown (put into motion), but after reaching its peak, gravity (an external force) acts on it, causing it to fall to the ground.