Concept:Choosing the most suitable verb for the given context.Explanation:The sentence discusses Botany, the scientific study of plants.A botanist learns about plants, but the common phrase is "study flowers.""Read" and "know" do not fit the sense of active scientific learning."Examine" is too narrow and does not collocate naturally with "flowers" in this general statement.Thus, "study" is the correct option.Answer:C. study