I already answered this :)
It's called musical form.
The last one (you wrote b but I think you meant e?) I think.
A system called Khipus to record statistical info c:
Answer: Mixed media art involves mixing different creative mediums to create work that incorporates two or more art forms. For example, you can add sculpture to your painting, or draw on top of photography prints. Mixed media is all about breaking the boundaries between different art forms. Artists need to look at everything as a potential canvas.
Explanation: