(this is a music question but there is no music subject option) which is an example of a ternary form 1. a b a c a 2. a b a c a b a 3. a b a 4. a b c

Above is a picture of one of the most famous discoveries ever to be found in china. answer the following questions: - what does the picture show? - when and where was it discover? - who discovered it and what was he doing when he/she discovered it?