instruction:
Write a correct answer to the given question based on its associated fact. Make sure that your answer is contained in the associated fact. Don't be creative and introduce any new word that is not mentioned in the associated fact! Remember that the associated fact has been rearranged to form the question. So, the correct answer words must lie within the associated fact. The correct answer can be a word, phrase, or even a sentence.
question:
Fact: If a planet becomes too hot, then it cannot maintain a balanced ecosystem. 
Question: If a planet becomes too hot, then it cannot maintain what?
answer:
balanced ecosystem.


question:
Fact: fungicides are toxic to humans and result in higher levels of UV radiation reaching Earth. 
Question: Higher levels of UV radiation can reach to earth by what means?
answer:
toxic human fungicides.


question:
Fact: Most of the second-largest invertebrate group have shells. 
Question: what do the second-largest invertebrate group have?
answer:

shells.