Answer:
A). Purpose; Audience.
Step-by-step explanation:
The 'purpose' and 'audience' play a vital role in directing the techniques like images, sound, or layout, etc. employed to portray a piece of media play in order to enhance its impact on the audience constructively. The purpose behind presenting the play(which could be to inform, amuse, entertain) would help determine the effective techniques to be employed to influence the audience efficiently and the 'audience' group would affect the reason for employing certain techniques in order to create the desired impact on the audience and elicit intended response. Thus, option A is the correct answer.