No unnecessary movement or noises is a practice
A. Captive audience
B. Audience Etiquette
C. Direct and immediate impact
D. Communal experience

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"

Answerborromini;