Please choose the correct ending to complete the given sentence: Health: [header] How to make your home smell like spring [title] Leave your windows open. [step] If it's spring already, the easiest way to capture the smell is to simply leave your windows opened. This works especially well if you have a backyard with a lot of trees.

Ending1: [substeps] Opening up your windows will produce the most fresh air while also leaving the exterior warm. Open your windows only when it's hot. Ending2: Try leaving windows open during the day to let fresh spring air waft inside. [substeps] This may not work as well if you live in a more urban area. Ending3: This is also most convenient in winter, as air you breathe can be filtered out through a thin layer of leaves and foliage. [substeps] Open the window if there is one, as that will help add flavor and moisture to your windows. Ending4: [substeps] Work a miniature greenhouse, rather than a chain-link one. [title] Make sure the room has ample privacy.

Answer format: ending1/ending2/ending3/ending4