What are the Principles of Design?

The principles of design are the rules a designer must follow to create an effective and attractive composition. The fundamental principles of design are Emphasis, Balance and Alignment, Contrast, Repetition, Proportion, Movement and White Space. Design differs from art in that it has to have a purpose.

Explanation:

What i think is that it adds loudness for preachers/church choirs. it is also able to hold up a lot of weight without pillars. : )) idek tho

Ireally don't know the answer