What type of material would a seismic wave travel through fastest?

a. sand
b. water
c. slate
d. mud

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the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .