Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to treat dry eyes [title] Understand why tears are important. [step] Not only do tears keep the eyes moisturized, they also perform several important roles. Tears provide necessary electrolytes and have bacteria-fighting enzymes and proteins which keep your eyes healthy.

Ending1: Keeping them moist can also improve cell air flow. The humidity in your home keeps your eyes moist and you can avoid dry eyes by wearing eye protection when you dress or sleep. Ending2: Your eyelids also act as an eye mask and carry the calming hormone, which in turn stimulates the production of tears. [substeps] When you're looking for some specific medicines for dry eyes, make sure you follow the directions given by the doctor and know how many to give. Ending3: [substeps] Moisture is an important part of body hydration. Moisture can help strengthen the collagen cells in the eyes and give them radiance. Ending4: Tears quickly cover your entire eye to provide moisture and nutrients all over. [substeps] A problem with any part of a tear can cause problems for your entire eye.

Answer format: ending1/ending2/ending3/ending4