Answer the following question given this paragraph: 

For most of a star’s life, hydrogen atoms fuse to form helium atoms. A star like this is a main sequence star . The hotter a main sequence star is, the brighter it is. A star remains on the main sequence as long as it is fusing hydrogen to form helium.


Q: For most of a star’s life, hydrogen atoms fuse to form what?

 Choices:

- neon atoms

- ionic atoms

- gas atoms

- helium atoms

A:
helium atoms
