Please choose the correct ending to complete the given sentence: Health: [header] How to help develop your baby's eyesight [title] Turn on a light in baby's room. [step] In the first four months, a baby can only focus on an area between 8 and 12 inches from their face. Your baby will respond to movement in the first week.

Ending1: However, play with your baby just to make sure they are not less focused and developing eyesight. [title] Teach your baby how to hold objects. Ending2: However, they will get eyesight acclimated to the light within a few hours. [substeps] The illumination from candles or incandescent lightbulbs is great to diffuse and bounce light from. Ending3: For the first week of toddler development, try to keep the lights off around the room at all times. [substeps] You don't have to turn them on if it bothers you or scares you. Ending4: Exposing your baby to light during the day and small amounts at night cannot only soothe them, but also help develop their ability to focus on you and other movements. [substeps] Use a nightlight or another dim lamp in your baby's room.

Answer format: ending1/ending2/ending3/ending4