Question

What does Einstein‘s theory of relatively, which posits that movement in space and time is relative to the person measuring them, mean? check all that apply.

Answer 1

That reality is objective,

so each person's perception is one's own truth, reality is unique to each individual, each person perceives space and time differently, and people's perception is not necessarily true to everyone else.

Thus laws of physics are the same for all observers if they're accelerating or moving in space and time in uniform motion, if they're Not, the perception of these only relates to that object or observer accelerating. ("Special relativity")