Mono = one, hence "Monologue", which is a one-person talk.
Di = two, hence "Dialogue", which is a two-person talk.
Tri = three, hence "Trialogue", which is a three-person talk. This is not commonly used - discussion or conversation are more commonly used.
A dialog typically involves at least two people engaging in a two-way conversation. It can also include more participants, depending on the context and purpose of the dialog.
No, 'he' is a third person pronoun.The first person is the speaker: I enjoyed the concert.The second person is the one spoken to: You enjoyed the concert.The third person is the one spoken about, not involved in the dialog: He enjoyed the concert.
Soliloque
1 person...
One person. Lee Harvey Oswald was the only person involved in his death.
imbroglios
Different for each person. Pay more attention to the dialog.
The Person Involved in the development of computer is The Person Involved in the development of computer
a lot
Zip
five times
Dialog boxes