You are presented with the question "When gas is heated, it takes up more:" and the following answer choices: 
- solutes
 - plasma
 - fluidity
 - energy
 - space
 - viscosity
 - matter
 - Energy.

Now knowing that if gas is heated then that gas will expand and if more space between 2 galaxies more space to expand so it moves away faster, choose the best answer.


 

     space    