b. in the oscillating electric and magnetic fields
Explanation:
Electromagnetic waves are formed when mutually perpendicular electric and magnetic field oscillate in space. Electromagnetic waves carry electromagnetic radiant energy from the electromagnetic filed. Electromagnetic waves do not require a medium to propagate. The direction of propagation of the electromagnetic wave is perpendicular to the direction of the vibrating electric and magnetic field.
they identify factors that affect chemical processes then they determine the amount of substance produced or consumed then predict the amount of energy released or absorbed
