Fact 1: Telephones are used for communication by two people by transmitting sound. Fact 2: Sound Sound waves are mechanical waves. Given the two facts above, what do people transmit when using telephones for communication?
Available options: (a). internet signals; (b). diseases; (c). fibers; (d). SNPs; (e). power; (f). waves; (g). energy; (h). h2o;
Answer:
(f).