The control variables are the type of plant , the pot , the soil , amount of water , and the time of the experiment .
(The control variables; are; the type of plant , the pot , the soil , amount of water , and the time of the experiment) (The control variables; are the type of; plant)
The control variables The control variables
are are the type of
the type of plant , the pot , the soil , amount of water , and the time of the experiment
plant