Answer:
Option B, in the core of the star
Explanation:
All the stars generate energy through the process of nuclear fusion. These nuclear fusion reactions take place with in the core of the star . The pressure with in the core of the star is extremely high which is the main causative factor of nuclear fission reactions.
Since the source of energy lie with in the core of the star, it is sure that electrons in surface atoms of a star get their energy from the core of the star.
Hence, option B is correct