A back and forth motion that transfers energy from one place to another is called a(an) __.

O compression.
O oscillation
O period

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

sorry i was late, but i don't know what assignment your talking about, i'm in flvs as well, im in earth space science. but u are behind pace bc every class should be in the 3's or 4'