In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.
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Question: Sentence: Animals produce most of enzymes chemicals, which are needed to synthesize the fatty acids they need. Question: Animals produce most of what chemicals, which are needed to synthesize the fatty acids they need?

Answer: enzymes


Question: Sentence: Proper chemical formulas for ionic compounds balance the total positive charge with total negative charge. Question: Proper chemical formulas for ionic compounds balance the total positive charge with what?

Answer: total negative charge


Question: Sentence: The main advantage of urea is its very low toxicity. Question: The main advantage of urea is its very low what?

Answer:
toxicity