Please choose the correct answer to the question: During science class, students combined 1 kg of iron filings with 1 kg of sand to create a mixture. Which of the following methods would be best for separating the iron filings from the sand?

Answer1: Stir the mixture into hot water to dissolve the sand. Answer2: Strain the mixture through a paper filter to collect the sand. Answer3: Drag a magnet through the mixture to attract the iron filings. Answer4: Shake the mixture to cause the iron filings to settle to the bottom.

Answer format: answer1/answer2/answer3/answer4
Answer: answer3