Answer:
1. sound waves
2. eardrum vibrates
3. the bones in the middle ear amplify
4. the hair cells move up and down
If you want that translated you're outta luck from me. I think it's asking about the importance of art in Brazil's culture? Is that Portuguese maybe? If you want the question answered I've got no idea, mainly cause I don't know much Portuguese and cause I don't know the importance of art in Brazil D:
Double variations appear during the Second movement of the Beethoven's Fifth Symphony.
Answer: Classical Era (latter half of 1700s)