Question

Which of these help create radio waves?

changing electric and magnetic fields applied at right angles

longitudinal waves traveling along the horizontal direction

compressions traveling along the vertical direction

transverse waves traveling at different speeds

Answer 1

Radio waves are transverse waves. oscillations occurring perpendicular (or right angled) to the direction of energy transfer.
The electric and magnetic field are perpendicular each another and perpendicular to the direction of energy transfer.
All radio waves travel at the velocity of light.
The answer is: changing electric and magnetic fields applied at right angles