You are presented with the question "Nuclear reactions in stars cause them to brighten up what?" and the following answer choices: 
- the morning grass
 - the elemental waves
 - an object
 - the summer sky
 - hydrogen and oxygen
 - Change colors
 - the evening tide
 - an electron lens

Now knowing that nuclear reactions in stars causes stars to produce light and june Summer Triangle Three bright stars light up the summer sky, choose the best answer.


 

    the summer sky     