Pleasee someone help with this

B. Type of fertilizer

Explanation:

The independant variable would be the type of plant fertilizer. A helpful saying to remember how independendant and dependent variables is as follows:

"Independant variables predict what will cause change in the dependant variable. The dependant variable is DEPENDANT on the independant variable."

Best of luck xx

no i don't feel that humans have oversubscribed some medications

the answer is c a tornado