The correct answer among the choices provided is option A. Lung capillaries are responsible for exchanging carbon dioxide for oxygen from the air. Blood that comes from the heart gets oxygen from the alveoli. The carbon dioxide in the blood goes into the alveoli at the same time.
Out of the photosynthesis (plants).
HI there
I would go with D.cirrus
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-Ans-
Flower because the others are a organ which make the plant live but the flower is more of a decorative thing to make the plant stand out