Which option is categorized as a safe sleeping environment for newborns?

A bassinet is recognized as a safe sleeping environment for newborns due to its design that typically includes a flat, firm mattress and is small enough to keep the infant close to the caregiver while still providing a safe space. Bassinets are specifically made for young infants and comply with safety standards that help reduce the risk of Sudden Infant Death Syndrome (SIDS) by ensuring proper airflow and minimizing the possibility of entrapment.

In contrast, while a playpen and crib can also be safe sleeping environments, they are usually designed for different age groups or purposes. Playpens might not offer the same level of restrictiveness and safety that is critical for newborns. Cribs are generally appropriate for older infants as they grow, so while they are safe, a bassinet is more suitable for a very young newborn. Support furniture, on the other hand, does not offer a designated flat and secure sleeping area, which is essential for a baby's safe sleep.