What is referred to as essential clothing and items needed for a newborn baby?

The term that refers to essential clothing and items needed for a newborn baby is the layette. A layette typically includes a variety of clothing such as onesies, sleep sacks, booties, and hats, as well as smaller items like diapers and bibs that are crucial for the care of an infant. It encompasses the basic wardrobe and accessories required to ensure the baby's comfort and hygiene in the initial months.

The other options, while related to newborn care, do not specifically represent a comprehensive collection of essential baby clothing. A diaper bag is mainly used for carrying baby supplies when going out, and while it's necessary, it doesn't define the clothing itself. A nursery set usually refers to furnishings or decor for the baby's room rather than clothing. Crib essentials typically involve items associated with the crib, such as bedding and safety items, but again, these do not cover the broader range of clothing and essential items that a layette includes. Therefore, identifying the layette highlights the foundational needs for dressing and caring for a newborn.