You are functioning within newton’s laws of motion when you
dive off a diving board
are sleeping
play tennis
are studying

Newton's first law says that "every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force."

All of those would be correct for it is pretty much impossible to break the law of motion. If you're moving or stationary, you need the influence of an external force to change the pattern.

people can eat food during that time

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.