Answer:
Option RADIO WAVE
Explanation:
Radio waves, a type of electromagnetic waves are used to transmit cell phone signals. These waves are a non-ionizing form of radiation, which means that they do not break chemical bonds.
Frequency range: 450 - 2700 MHz
Peak Power : 0.1 - 1 watts
According to the World Health Organisation, studies carried out as of 2014 have shown no health risks associated with mobile phone radiation, but more research is needed to fully understand the possible health effects.
