You are presented with the quiz "What causes stars to produce light?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "nuclear reactions in stars causes stars to produce light" and "like the Sun, stars generate light and heat through nuclear fusion". So, what's the best answer to the question?
Select from:
A). nucleus
B). energy
C). gases
D). mitosis
E). fusion
F). chemicals
G). fire
H). boiling
E).