Why can't an object be defined as art based on materials and good design alone?

Ais the visual display of an object meant for a computer replication. it is created using complex mathematical formulas, which creates and connects the lines, curves, and surface of the 3d object.

Which one of these percussion instruments is not part of a standard drum set or drum kit? a. ride cymbal b. bongo drum c. snare drum d. bass drum

To create this piece, the painter used his/her fingers and fiber brushes to apply reddish pigment made from a. (1) horse tail; (2) basalt b. (1) yucca; (2) iron-oxide c. (1) animal; (2) sulfur d. (1) cotton; (2) charcoal