Answer:
A) nuclear energy
Step-by-step explanation:
The energy stored in uranium atoms which is found within the sun is nuclear energy. 
Nuclear energy is a vary vital form of energy that is release when radioactive substances undergoes natural decay to give other ionizing particles.
-  Nuclear energy produces a great deal of energy. 
- In this processes mass is converted to heat energy which produces radiant energy throughout. 
- This energy is used to power the solar system. 
- When the nucleus of an atom is broken down, this energy is released in the process.