Sound waves have two parts. the part of the wave where the particles of the medium are pushed together is called the
a) rarefaction
b) compression
c) pitch
d) amplitude

Sound waves have two parts. The part of the wave where the particles of the medium are pushed together is called the .

compression

answer; ///i believe the correct answer is (aids) acquired immune deficiency syndrome;

it's     c       this is a cell (b) with a nucleus (c) containing dna (a). the dna is organized into chromosomes (d). a section of the chromosome that codes for a trait is called a gene (e).