A variable that affects the relation between two other variables is known as a

A) moderator.
B) catalyst.
C) transmitter.
D) residual.

Moderator

An independent variable in research that can affect the strength or direction of the relationship between a dependent and an independent variable.

Catalyst

A substance or agent that increases the rate of a chemical reaction without itself undergoing any permanent chemical change, or metaphorically, something that triggers a significant event or change.

Transmitter

A device or system that sends out signals, messages, or other forms of communication through various forms of media.