The sentence presents a concrete diction with a positive connotation.
There are several different types of diction and within these types, concrete diction is what we can perceive in the sentence shown in the question above. Concrete diction uses objective words to stimulate sensations in the reader.
We can see this type of diction when the author uses objective words to describe the plant and then shows how it is capable of provoking good sensations in the human heart.
It is also possible to perceive the use of the positive connotation, which is the artifice of using words that convey good and optimistic meanings to the reader. It is possible to perceive the use of this type of connotation because the reading of the sentence shows the plant as something good and admirable.
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