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: a drug that can be addictive is an example of a psychoactive drug. 
Question: a drug that can be addictive is an example of a what?
answer:
psychoactive drug.


question:
Fact: Insects have more social behaviors because all family members are close relatives. 
Question: Insects have more social behaviors because all what?
answer:
family members are relatives.


question:
Fact: a cactus stem is used for storing liquid. 
Question: A cactus stem is used for storing what?
answer:

liquid.