The correct answer is option 1: infrared waves.

A television remote uses infrared waves to communicate with the television. Infrared waves are a form of electromagnetic radiation that has longer wavelengths and lower frequencies than visible light. These waves are emitted from the remote control and detected by a sensor on the television, allowing the remote to send commands to the TV.

Option 2, cosmic waves, is incorrect. Cosmic waves, also known as cosmic rays, are high-energy particles that originate from outer space. These particles are not used in television remotes.

Option 3, microwaves, is also incorrect. Microwaves are a form of electromagnetic radiation with wavelengths longer than those of infrared waves. Microwaves are used for cooking in microwave ovens and for wireless communication, but they are not used in television remotes.

Option 4, ether waves, is not a scientifically recognized term. It is not used in reference to any form of electromagnetic radiation and is therefore incorrect.

In summary, a television remote uses infrared waves to send commands to a television.