What is one common application of microwave frequencies?

The application of microwave frequencies in satellite communication is significant due to the ability of these frequencies to transmit large amounts of data over long distances with relatively low loss. Microwaves can penetrate the atmosphere more effectively than lower frequency radio waves and are less susceptible to interference from rain and other environmental factors. This makes them ideal for the transmission of signals in satellite systems, where reliable communication is crucial. Satellite communication systems leverage microwave frequencies to enable services such as television broadcasting, internet access, and secure military communication.

The other options, while related to microwaves or frequencies in some context, do not encapsulate the primary and widespread application of microwave frequencies to the same extent as satellite communication. For example, household heating appliances use microwaves primarily for cooking but do not represent the breadth of applications that microwaves have within telecommunications.