Help me with this please ASAP

It’s the third one A mirror is a reflective surface. Light rays bounce off an object to this surface and then are reflected to the viewer's eye, causing him to see a reflected image of the object. ... Light rays diverge off the curve of this mirror. The image may be upside down if the object is too far away.

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on