What sturdy furniture item helps support infants when they are upright?

Support furniture is specifically designed to assist infants as they begin to gain the strength and coordination necessary for standing and climbing. This type of furniture typically includes items like activity tables or sturdy play tables that provide a safe and secure surface for infants to pull themselves up and explore their environment while being held in an upright position. This promotes muscle development and encourages the infant's physical growth as they practice standing.

In contrast, a crib serves primarily as a sleeping space and is not intended for assisting infants in standing. A safety gate is designed to prevent access to certain areas, ensuring safety rather than supporting any physical activity such as standing. A bassinet, much like a crib, is primarily a sleeping furniture item meant for younger infants and does not provide the necessary support for them to stand up. Thus, support furniture is the appropriate choice as it directly aligns with the developmental needs of infants who are learning to be upright.