Generate a sentence that answers this question: "The lungs give O2 to the".

Answer: the respiratory system transfers oxygen to the circulatory system

Generate a sentence that answers this question: "Porpoises move fastest in".

Answer: large fins can be used to move quickly through water

Generate a sentence that answers this question: "A plant performs less photosynthesis in".

Answer:
a leaf absorbs sunlight to perform photosynthesis