Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: It's easy to save water at home. If you save even a few gallons a day you can make a big difference over the long run. The best place to start saving water is in the bathroom. Toilet flushing is the single biggest use of water in the home. Showers and baths are the next biggest use. Follow the tips below to save water at home. Answer: flushing the toilet
A:
What action, performed multiple times daily, is the single biggest use of water in the home?