Bob is curious to know which plant fertilizer, if any, will help his pepper plants to produce more peppers. He decides to test the 3 brands that the local nursery sells. He sets up four boxes and plants 3 sets of pepper plants in each box. he gives 30g of one type of each of the three fertilizers to the first three boxes, and adds no fertilizer at all to the fourth box. What is the control group in Bob's Experiment?

The set of pepper plants in the fourth box are the control group

Explanation:

The aim of the experiment is to determine the plant fertilizer that will give the most pepper yield

The number of types of fertilizers used under the study = 3 brands

The number of boxes set up for the experiment = 4 boxes

The number of pepper plants planted in each box = 3 sets

The fertilizers applied to each box = One different type for each of the first three box

The type of fertilizer applied to the fourth box = No fertilizer

The control group is the group to which the effect of the other groups subject to the experimental treatment are compared, and the group not subject to the treatment of the experiment.

Therefore;

The set of pepper plants in the fourth box are the control group.

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.

true because they can bargain