I think youre right but im not positive
A famine may occur when there is a food shortage due to a bad crop of a certain food. Or if there is more people needing a certain food than what is available. <span />
A mechanical wave is created when a medium allows the transfer of energy, or moves back and forth or up and down. It <span> is a </span>wave that is a vibration in matter, transferring energy through a material. <span>While </span>waves<span> can move over long distances, the movement of the medium of transmission is limited. Hope this answers the question.</span>