Final answer:
The student is drawing a conclusion based on the results of the experiment that the acidic soil prevents plants from growing.
Step-by-step explanation:
The subject of this question is Biology.
The correct answer is B. Drawing a conclusion.
When the student states that the flowers did not grow as much in the more acidic soil, and concludes that the acidic soil prevents plants from growing, they are drawing a conclusion based on the results of the experiment. Drawing a conclusion is the final step of the scientific method, where researchers analyze their data and make a statement about the relationship between variables.