In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
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Question: Question: Trees release what gas as a byproduct of photosynthesis, thereby facilitating human respiration? Answer: oxygen

Answer: Trees release oxygen gas as a byproduct of photosynthesis, thereby facilitating human respiration.


Question: Question: What is the key to the demographic transition? Answer: reduced family size

Answer: Reduced family size is the key to the demographic transition.


Question: Question: When and where would the number of daylight hours each day be greatest? Answer: during the summer near the North Pole

Answer:
The number of daylight hours each day would be greatest during the summer near the north pole.