Answer:
usage of trills and vibrato
Explanation:
earlier music used trills while later styles would use vibrato.
Answer:
r = k [ B ]
Explanation:
⇒ r = k [ A ]/2 = k [ B ]
It's a cyclohexane ring with an ethyl group at 1 and a methyl group at 3. The Ethyl group is bigger and more important group get's the first position.
1-ethyl-3-methylcyclohexane