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: Which single most factor is responsible for the extinction of hundreds of species of birds? Answer: human actions

Answer: Human actions is responsible for the extinction of hundreds of species of birds.


Question: Question: What causes waves to bring sand up onto the beach during summers? Answer: low energy

Answer: Low energy causes waves to bring sand up onto the beach during summers.


Question: Question: Which observation demonstrates that light waves travel much faster than sound waves? Answer: An exploding firework is seen before it is heard.

Answer:
An exploding firework is seen before it is heard observation demonstrates that light waves travel much faster than sound waves.