Sara needs to replace her kitchen faucet as soon as possible. Fixing the leaky faucet should be the first priority as it is a constant source of water waste, even though upgrading the washing machine and toilet is also crucial for water conservation. Over time, a leaky faucet can waste a lot of water—often several gallons every day. Sara may immediately begin conserving water and cutting back on her water usage by fixing the leaky faucet. To further improve her eco-friendly home, she can replace the washing machine and toilet after fixing the faucet problem.

By replacing the kitchen faucet, Sara will be able to eliminate the water waste caused by the leak. This will not only help her to conserve water but also reduce her water bill. Fixing the leaky faucet should be the first priority for Sara because it is a constant source of water waste that can add up to several gallons every day over time.

While fixing the faucet is the most urgent step, Sara should also consider upgrading her washing machine and toilet to further improve water conservation in her home. Older washing machines and toilets are often less efficient and can use more water than newer, energy-efficient models. By replacing these appliances, Sara can reduce her water usage significantly.

Upgrading the washing machine is particularly essential as it accounts for a significant portion of water consumption in households. Energy-efficient washing machines use less water and energy during each cycle, thus reducing water waste and lowering utility bills. Similarly, replacing the toilet with a water-efficient model can save a substantial amount of water with each flush.

Overall, by prioritizing the replacement of her leaky faucet and subsequently upgrading the washing machine and toilet, Sara can make her home more eco-friendly and reduce her water consumption in a significant way.