The tenor, mode, and field of discourse are three parameters related to the meaning "EXPRESSIVE."
The above statement is true because all the three attributes of discourse, when combined, allow people to express themselves effectively. The three attributes are expressive in the sense that they define entirely the situational context of the message that is being passed in clear terms whether spoken or written.
There is power in collective action as the one mouse could do nothing to the cat. But the one cat could do nothing to the dog, but 34 mice could because there is power in collective action.