why can having an understanding of imagery, proportion, balance, and design help you evaluate the validity of an artwork

Which book cover has these characteristics? made using the gold tooling process on leather

The dynamics of a musical piece refer to the a. key signature b. composer’s history c. volume changes d. instrumentation

In areas where even the experts disagree; everyone has a right to his own opinion. i mean if answers aren’t given just like in lots of things; then it has to be just anyone’s opinion. is this dualism multiplicity relativism or commitment