Question

what is electromagnetic radiation? a type of magnetic field produced by electronic devices a type of energy that travels through space in waves a form of physical energy that only travels thro solids

Explanation:

Electromagnetic radiation is a type of energy that travels through space in waves. It is not just a magnetic field from electronic devices (as it's a broader concept involving electric and magnetic fields oscillating). Also, it can travel through vacuum (not just solids).

Answer:

A type of energy that travels through space in waves