What is your impression about the music you have heard?

It depends on what type of third separates the three notes.for example: if you have two mayor thirds is an "aumented chord"if you have two minor thirds is an "diminued chord"if you have one mayor first and then one minor is a "mayor chord"and inverted is a "minor chord"

The answer is a : varying the size of objects or subjects, so that some are smaller than others and the illusion of depth is created.hope this : )