All of the above answers are correct.
Phrase is used for saying that two things have an equal effect or importance (equal measure).
Media. So, one piece of art can be made of one medium or
several media. If you've ever been to an art museum or gallery, you've
probably seen those little signs next to each piece that look something
like this:
'Oil on Canvas'
'Tempera on Wood'
'Ink on Silk