What is audience? what is purpose? what is tone?

Audience is the assemble spectators or listeners

Purpose is the reason for which something is done or created or for which something exists

Tone is the general character or attitude of a situation

Audience - the assembled spectators or listeners at a public event such as a play, film, concert, or meeting.

- a formal interview with a person in authority.

Purpose - the reason for which something is done or created or for which something exists.

- a person's sense of resolve or determination.

- have as one's intention or objective.

Tone - a musical or vocal sound with reference to its pitch, quality, and strength.

- the general character or attitude of a place, piece of writing, situation, etc.

- give greater strength or firmness to (the body or a muscle).

- harmonize with (something) in terms of colour.