A diagram of an electrical process. A steady wave enters an unlabeled device. Simultaneously, a signal is captured by a microphone, which is relayed to the unlabeled device by a squiggly line. The device generates a wave where the waves are of different heights. What kind of modulator is used in this scenario?

modulator

Farmer a has a deep well and needs a lot of water for her animals and crops. her neighbor, farmer b, has a shallower well. he needs less water than farmer a because his farm is smaller. in years of drought, sometimes farmer b can't get any water from his wells. what can farmer b do to decrease the likelihood of his well running dry?