Answer:
In physics, electromagnetic radiation (EM radiation or EMR) refers to the waves (or their quanta, photons) of the electromagnetic field, propagating (radiating) through space, carrying electromagnetic radiant energy. It includes radio waves, microwaves, infrared, (visible) light, ultraviolet, X-rays, and gamma rays.
Explanation:
If I understood the question.
changes shape after the reaction is not true
The answer would be...
(B) Respiration
Hope this helped!!… :D
Please explain your question more specified
I thinks its a layer of soil with characteristic properties, sorry if its wrong I'm a beginner