What is the basis of all sound?

a: vibrating molecules in the air
b: wave cycles
c: nodes
d: waveforms

(i think it's a or b)

99 pts! in three to five sentences, compare and contrast these two terms: classical music and classical music.

Which describes which ctso each student should join? eleanor should join nyfea, russell should join fea, giada should join tsa, and joe should join hosa. eleanor should join fbla-pbl, russell should join ffa, giada should join fea, and joe should join fccla. eleanor should join ffa, russell should join deca, giada should join nyfea, and joe should join hosa. eleanor should join fbla-pbl, russell should join deca, giada should join tsa, and joe should join fccla.

The protects the ear, collects sounds, and channels them to the middle ear a middle ear b ear drum' c front ear d outer ear