what is released through nuclear fusion in stars?\no energy\no gas\no mass\no pressure

what is released through nuclear fusion in stars?\no energy\no gas\no mass\no pressure
Answer
Brief Explanations:
In stars, nuclear fusion combines lighter - nuclei into heavier ones. According to Einstein's mass - energy equivalence ($E = mc^{2}$), a small amount of mass is converted into a large amount of energy during this process.
Answer:
A. energy