I can sneak up on you or be right in front of you without you knowing. But when I reveal myself you will never be the same. Who am I?

Which statement about sculptures depicting humans made in ancient egypt, greece, and the roman empire is true? question options: they had arms and legs that didn't protrude so the sculptures would last an eternity. they could be made using formulas, could show ideal beauty, or could be realistic. they showed the common man. they were made using bronze.