In this task, you are given a fact statement and question based on the fact. Your task is to generate the correct answer for the question. The answer needs to be generated using the context fact statement.
--------
Question: Fact: smell is used for finding food by some animals. Question: Some animals are aided in finding food sources by?

Answer: aroma


Question: Fact: seed dispersal has a positive impact on a plant 's reproduction. Question: Seed dispersal?

Answer: benefits production of plant offspring


Question: Fact: polluting means something poisonous is added to an environment causing harm to the environment. Question: Factories often add something to the environment that is?

Answer:
posionous