Which artistic methods are ineffectual for conveying ideas? Why?

Throughout history, people have used art to communicate without relying on words. Art can express political ideas, reinforce religion, or convey deeply personal thoughts. ... Art communicates in different ways, including through symbols or allegory, in which a figure stands for an abstract idea

If your (k12) then it's all of them.i learned it the hard

A  documentary film  is a nonfictional motion picture intended to document some aspect of reality, primarily for the purposes of instruction, education, or maintaining a historical record.example:     20,000 days on earth