Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to care for air plants [title] Find your plant's discs. [step] Air plants have tiny silver discs or scales all over their leaves. If you look closely at an air plant in bright light, you will see the discs shimmering.

Ending1: If the discs are caught on a sunny windowsill during the day, they will emit an orange glow. [substeps] But what if you pick up an air plant from a nursery and tear apart the discs into separate tubes? [title] Inspect the air plant. Ending2: These discs absorb moisture and nutrients for the plant. [title] Water air plants every two to three days during spring, summer and fall. Ending3: The discs should be about an inch to an inch thick. [title] Choose a space for the air plants. Ending4: If you bring your plant into direct sunlight, your air bulb should spark and ignite when you leave it. If it doesn't ignite, leave it out to dry.

Answer format: ending1/ending2/ending3/ending4