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: Pollen grains are small male reproductive bodies of plants used to pollinate female flowers. 
Question: pollen grains are small male reproductive bodies of plants used to pollinate what?
answer:
female flowers.


question:
Fact: Mammals can generate little bursts of energy by shivering. 
Question: What can a mammal produce by shivering?
answer:
energy.


question:
Fact: changes in the pH of soil can cause plants to decay and leave minerals for future plants. 
Question: Changes in the pH of soil can cause plants to decay and leave what for future plants?
answer:

minerals.