Final answer:
The subject of this question is Physics, which deals with the behavior of matter and energy. It involves the study of natural phenomena, such as storms, lightning, and thunder.
Step-by-step explanation:
The subject of this question is Physics. Physics is the branch of science that deals with the behavior of matter and energy, including the interactions between them. It involves the study of various natural phenomena, such as storms, lightning, and thunder, which are relevant to this question.