What is a normal duration of sleep for a baby?

The typical duration of sleep for a baby is indeed between 20 minutes to 4 hours. Infants have shorter sleep cycles compared to adults, often experiencing rapid transitions between sleep and wakefulness. It's important to note that newborns can sleep for varying lengths, and it's not unusual for them to wake frequently for feeding or other needs, making periods of sleep shorter and less predictable.

The other options suggest durations that are less aligned with the sleep patterns observed in infants. While adults might typically achieve longer stretches of uninterrupted sleep, babies' sleep is characterized by shorter durations, which is crucial for their development and their need for frequent feeding. Understanding these sleep cycles is essential for caregivers to respond appropriately to an infant's needs and to help establish a healthy sleep environment and schedule.