Question

drag the red box over the control.
1
zero drops of fertilizer
2
2 drops of fertilizer
3
4 drops of fertilizer
4
6 drops of fertilizer
(yellow drop) fertilizer

Explanation:

Step1: Identify the control group

In an experiment, the control group is the one with no (or standard) treatment. Here, the plant with 0 drops of fertilizer (group 1) is the control as it has no fertilizer (the variable being tested), only water (blue drops).

Step2: Drag the red box

Drag the red box (from the right) over the plant labeled 1 (with 0 drops of fertilizer, blue drops only).

Answer:

Drag the red box over the first plant (labeled 1, with 0 drops of fertilizer, only blue water drops).