Question

You want to see if mold grows faster on bread in the shade than on bread in the sun. Your experimental variable is _____.

Answer 1

your variable is gonna be did it grow faster in the shade or the sun
 

Answer 2

The correct answer is "THE SUN". I just completed the lesson so I know for a fact that this is the answer, I hope I helped!

There seemed to be a lot of confusion with this question so I felt I had to verify.