What makes them harmful or not harmful to human body? Which part do wifi, cellphone, or microwave radiation belong to? Are they harmful to human body?

Does wifi, cellphone or microwave radiation affect our health? and Why

Along with this document, there are 5 research papers included in the Final Project folder on Blackboard that you are required to read and refer to when writing your own research paper. More specifically, these 5 research papers should serve the following purposes as you prepare, draft and edit your final research paper:
As templates or sample papers as you write your own;
As your references .
In this paper, you are also required to give a clear introduction to Electromagnetic Waves , including:
Different parts of the EM spectrum
What’s in common and what are the differences among different parts of the EM spectrum?
What makes them harmful or not harmful to human body?
Which part do wifi, cellphone, or microwave radiation belong to? Are they harmful to human body? If yes, what makes them harmful? If no, please explain. What evidence do you have to support your claim/hypothesis?