Which 2 species? like I need to know in order to tell you
Answer: i would say the independent variable is the soil and the control variable is the seed because it stays the same in all of them to better understand the experiment while the dependent variable is the fertilizer.
Explanation: i am not completely sure but maybe someone else can also answer to verify it first
Our youth is exposed to cigarettes, vape pens etc and that whole industry trying to target the youth even make them flavorful to be more appealing to the youth
Hopefully this will help and it's what you are looking for.
I believe the best answer is C.