You are presented with the question "Electrons separating from what in certain bright astronomical objects forms plasma?" and the following answer choices: 
- flames
 - iron
 - Energy.
 - atoms
 - matter
 - energy
 - quarks
 - rocks

Now knowing that plasma is formed by electrons separating from atoms in stars and color can be seen in some bright astronomical objects, such as stars, and bright planetary nebulae, choose the best answer.


 

    atoms     